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If
- Ob, Matthias , auxiliary bishop in Speyer and titular bishop of Daulia
Oba
- Ōba, Akira (* 1976), Japanese soccer player
- Ōba, Kenji (* 1967), Japanese football player
- Ōba, Masao (1949–1973), Japanese flyweight boxer
- Ōba, Minako (1930–2007), Japanese writer
- Oba, Pierre (* 1953), Congolese politician
- Ōba, Sakae (1914–1992), Japanese officer
- Ōba, Tsugumi , Japanese comic book writer
- Obach, Theobald (1843–1887), German technician and pioneer in cable car construction
- Obad, Adis (* 1971), Bosnian football player and coach
- Obada, Efe (born 1992), British American football player
- Obadov, Slavko (* 1948), Yugoslav judoka
- Obafemi, Abiodun (* 1973), Nigerian soccer player
- Obafemi, Michael (* 2000), Irish football player
- Obaid, Musa Amer (* 1985), Qatari obstacle runner of Kenyan origin
- Obaid, Soraya (* 1945), Saudi politician at the United Nations
- Obaid-Chinoy, Sharmeen (* 1978), Pakistani documentary filmmaker, Oscar winner
- Obajdin, Josef (* 1970), Czech football player
- Obal, Max (1881–1949), German film director
- Obaldía, José Domingo de (1845–1910), second President of Panama
- Obaldia, René de (* 1918), French author and playwright
- Oballa Owaa, John (* 1958), Catholic bishop
- Obalski, Claus (* 1954), German actor
- Obama Asue, Francisco Pascual , Equatorial Guinean Politician (PDGE)
- Obama Obono, Ildefonso (* 1938), Equatorial Guinean clergyman, Archbishop Emeritus of Malabo
- Obama, Auma (* 1960), Kenyan Germanist, sociologist, journalist and author
- Obama, Barack (* 1961), 44th President of the USA
- Obama, Barack senior (1936–1982), Kenyan economist and government advisor and father of Barack Obama
- Obama, Florent (* 1991), Cameroonian football player
- Obama, Malik (* 1958), Kenyan entrepreneur and politician
- Obama, Michelle (* 1964), US lawyer and wife of US President Barack Obama
- Obame Nguema, Paulin (* 1934), Gabonese politician
- Obame, Anthony (* 1988), Gabonese Taekwondoin
- Obana, Miho (* 1970), Japanese manga artist
- Obanana, Paula (* 1985), American badminton player of Filipino origin
- Obando Bravo, Miguel (1926–2018), Nicaraguan clergyman, Archbishop Emeritus of Managua and Cardinal
- Obando, Arnulfo (1962-2016), Nicaraguan boxer and boxing coach
- O'Banion, Dean (1892–1924), American gang leader and rival of Al Capone
- O'Bannon, Dan (1946–2009), American screenwriter and director
- O'Bannon, Frank (1930–2003), American politician
- O'Bannon, Presley (1776–1850), US Marine Corps officer
- O'Bannon, Rockne S. (* 1955), American film director and film producer
- Obanyi Sagwe, Joseph (* 1967), Kenyan clergyman, Bishop of Kakamega
- Obara, Daisuke (* 1981), Japanese ice hockey player
- Obara, Hitomi (* 1981), Japanese wrestler
- Obara, Maciej (* 1981), Polish jazz musician
- Obara, Tadashi (* 1983), Japanese speed skater
- Obara, Tetsujirō (* 1941), Japanese jazz musician
- Obara, Yuria (* 1990), Japanese soccer player
- O'Barr, James (* 1960), American comic artist
- O'Barry, Richard (* 1939), American animal liberation activist and former dolphin tamer
- Obarzanek, Gideon (* 1966), Australian ballet dancer and choreographer
- Obasanjo, Olusegun (* 1937), Nigerian politician (President)
- Obasanjo, Stella (1945–2005), Nigerian first wife
- Obasi, Chinedu (* 1986), Nigerian soccer player
- Obasogie, Godwin (* 1954), Nigerian hurdler
- Obasuyi, Michael (* 1999), Belgian hurdler
- Obata, Jumpei (* 1988), Japanese soccer player
- Obata, Kayoko (* 1971), Japanese marathon runner
- Obata, Masamori (1534–1582), Japanese samurai
- Obata, Saori (* 1978), Japanese tennis player
- Obata, Takeshi (* 1969), Japanese mangaka
- Obata, Tokujirō (1842–1905), Japanese scholar, educator, reformer
- Obata, Toramori (1491–1561), samurai towards the end of the Sengoku period
- Obata, Toshishiro (* 1948), Japanese sword artist, one of the founders of the Shinkendō
- Obatake, Shiori (* 1996), Japanese grass skier
- Obauer, Karl (* 1953), Austrian cook
- Obauer, Rudolf (* 1961), Austrian cook
- Obayan, Sunny (* 1988), Nigerian-Spanish soccer player
- Ōbayashi, Chisa (* 1984), Japanese cross-country skier
Obb
- Obbarius, Lobegott Samuel (1788–1860), German classical philologist
- Obbarius, Theodor (1817–1855), German classical philologist
- Obberghen, Anton van (1543–1611), Dutch architect
- Obbink, Dirk (* 1957), American Graecist and papyrologist
- Obbo, Emmanuel (* 1952), Ugandan religious, Bishop of Soroti
Obd
- Obdržálek, Peregrin (1825–1891), Czech Catholic priest, author of religious literature, satire, humorous stories and verses
Above
- Obé, Max (1889–1969), German physician, medical officer, medical officer and Nazi doctor
- Ōbe, Yumi (* 1975), Japanese soccer player
- Obed, Aiman (* 1967), German-Israeli surgeon
- Obed, Elisha (1952-2018), Bahamian boxer
- O'Bee, Kirk (* 1977), American cyclist
- Obee, Patricia (* 1991), Canadian rower
- Obeid, Jean (* 1939), Lebanese lawyer, journalist and politician
- Obeidat, Ahmad (* 1938), Jordanian politician
- Obeidi, Iman al- (* 1982), Libyan lawyer
- Obeidi, Morsal (1991–2008), Afghan-German murder victim
- O'Beirne, Elisabeth , English badminton player
- O'Beirne, Frank (1903-1998), American naval officer
- O'Beirne, Kathy (* 1956), Irish author
- Obekop, Marius (* 1994), Cameroonian football player
- Obel, Agnes (* 1980), Danish singer and songwriter
- Obelerio Antenoreo , Doge of Venice
- Obelevičius, Sigutis (* 1959), Lithuanian educator and politician
- Obelmejias, Fulgencio (* 1953), Venezuelan boxer
- Obels-Jünemann, Hilde (1913–1999), German politician (SPD), MdL
- Obenauer, Karl Justus (1888–1973), German specialist in German, SS-Hauptsturmführer
- Obenauer, Klaus (* 1966), German Catholic theologian
- Obenauer, Philipp (1889–1966), Member of the State Parliament of Hessen
- Obenauf, Viviane (* 1986), Brazilian-Swiss boxer
- Obenaus, Fritz (1904–1980), German electrical engineer
- Obenaus, Herbert (* 1931), German historian, university professor and author
- Obenaus, Holger (* 1964), American composer, songwriter, guitarist, music producer and photographer of German origin
- Obenaus, Margaretha (* 1931), Austrian politician (SPÖ), member of the Federal Council
- Obenaus, Sibylle (1934–2020), German historian and author
- Obendiek, Wilhelm (1885–1955), German politician (SPD, KPD), MdR
- Obendorfer, Hubert (* 1965), German cook and hotelier
- Obendrauf, Viktor (1953-2010), Austrian chemist
- Obenfeldner, Ferdinand (1917–2009), Austrian politician, Vice Mayor of Innsbruck
- Obeng, Ernest (* 1956), British sprinter of Ghanaian origin
- Obenland, Carl (1908–2008), German landscape and portrait painter
- Obenland, Gottlob (1871–1966), German politician
- Obentraut, Hans Michael Elias von (1574–1625), Palatine cavalry general in the Thirty Years' War
- Ober, Erika (* 1950), German politician (SPD), Member of the Bundestag
- Ober, Frederick Albion (1849–1913), American naturalist and author
- Ober, Gerti (1907–1987), German film actress and voice actress
- Ober, Hermann (1920–1997), German painter and graphic artist
- Ober, Johann (1887–1968), Austrian politician (Landbund, ÖVP), member of the state parliament, member of the Federal Council
- Ober, Josef (* 1958), Austrian politician (ÖVP)
- Ober, Josiah (* 1953), American ancient historian
- Ober, Laurens (* 1995), Austrian ice hockey player
- Ober, Philip (1902–1982), American actor and diplomat
- Oberacher, Franz (* 1954), Austrian soccer player
- Oberacker-Pilick, Pia (* 1959), German writer, translator and antiquarian
- Oberaigner, Ernst (* 1932), Austrian ski racer
- Oberauer, Georg (* 1984), Austrian organist
- Oberauer, Klaus (* 1965), German psychologist
- Oberauer, Norbert (* 1968), German scholar of Islam
- Oberbach, Carl (1869–1939), German home chronicle
- Oberbach, Josef (1908–2003), German radiesthet, author and inventor
- Oberbacher, Hans (1914–2012), Austrian commercial artist and manufacturer of relief panoramas
- Oberbeck, Anton (1846–1900), German physicist and university professor
- Oberbeck, Heinz (1931–1995), German athlete
- Oberbeck, Hermann (1833–1894), German architect and master railroad builder
- Oberbeck, Ole (* 1970), German soccer goalkeeper
- Oberbeck, Simon (* 1983), Swiss politician
- Oberbeck, Tilman (* 1992), German jazz musician (double bass)
- Oberbeck, Willi (1910–1979), German racing cyclist
- Oberberg, Arthur (1888–1966), German politician (FDP), MdL
- Oberberg, Igor (1907–1996), German-Russian cameraman
- Oberberg, Ira (* 1918), German film editor
- Oberberger, Josef (1905–1994), German painter, draftsman, caricaturist, glass painter and art professor
- Oberberger, Sylvester (1841–1930), Austrian landowner
- Oberboersch, Josef (1884–1957), German painter
- Oberborbeck, Annedore (* 1982), German-Hungarian violinist
- Oberbreyer, Maria (* 1921), Austrian sprinter, hurdler and long jumper
- Oberburg, Andree Bernhardin von , Austrian officer
- Oberburg, Susanna von († 1601), Poor Clare with sympathy for Protestantism
- Oberburger, Norberto (* 1960), Italian weightlifter
- Oberdak, Czesław (1921–1945), Polish pilot
- Oberdan, Guglielmo (1858–1882), Italian folk hero
- Oberdick, Johannes (1835–1903), German classical philologist and grammar school director
- Oberdieck, Bernhard (* 1949), German illustrator
- Oberdieck, Georg (1869–1945), German officer and SA leader
- Oberdieck, Helmut (1918–2011), German masseur, physiotherapist, athlete, athletics trainer and artist
- Oberdieck, Johann Georg Conrad (1794–1880), German Protestant pastor and pomologist
- Oberdieck, Marie (1867–1954), German writer
- Oberdiek, Heinrich (1899–1986), German medical officer, inspector of the medical service of the Bundeswehr
- Oberdoerster, Friedrich (1915–1984), German hygienist
- Oberdorf, Fritz (1898–1976), German agricultural scientist, plant breeder, professor and rector
- Oberdorf, Lena (* 2001), German soccer player
- Oberdorfer, Alfred (1927–2013), German physician
- Oberdorfer, Bernd (* 1961), German Protestant theologian and university professor
- Oberdorfer, Erich (1905–2002), German plant biologist
- Oberdorfer, Günther (1899–1989), Austrian electrical engineer
- Oberdorfer, Ralf (* 1960), German politician (FDP), Lord Mayor of Plauen
- Oberdorfer, Simon (1872–1943), German entrepreneur, art cyclist and victim of the Holocaust
- Oberdörffer, Adolph (1822–1887), German pharmacist and chemist
- Oberdorffer, Kurt (1900–1980), Sudeten German, National Socialist historian and archivist
- Oberdörffer, Wilhelm (1886–1965), German high school councilor
- Oberdörster, Ernst (1888–1972), German resistance fighter and party functionary (SPD / KPD / SED)
- Oberdrevermann, Otto (1882–1942), German lawyer and politician (NSDAP)
- Obereder, Markus (* 1970), Austrian musician and choir director
- Oberegger, Daniel (* 1971), Italian composer, writer and filmmaker (South Tyrol)
- Oberegger, Elmar (* 1972), Austrian railway historian
- Oberegger, Josef (1896–1969), Austrian metallurgical engineer and politician, member of the National Council
- Obereigner, Otto (1884–1971), German Protestant pastor
- Obereiner, Bert (* 1970), German civil engineer and politician (AfD)
- Obereit, Jacob Hermann (1725–1798), Swiss writer, philosopher, surgeon and rediscoverer of a Nibelung manuscript
- Oberem, Sonja (* 1973), German triathlete and long-distance runner
- Oberem, Udo (1923–1986), German ethnologist
- Oberender, Peter (1941–2015), German economist and university professor
- Oberender, Thomas (* 1966), German author and dramaturge
- Oberer, Hariolf (1933–2017), German philosopher
- Oberer, Simone (* 1980), Swiss athlete
- Obererlacher, Hannes (* 1962), Austrian biathlete
- Obererlacher, Josef (* 1964), Austrian biathlon trainer and biathlete
- Oberfeld, Casimir , Polish-French composer
- Oberfohren, Ernst (1881–1933), German politician (DNVP), MdR
- Oberfranc, Gretchen (* 1951), American librarian
- Oberfranz, Karl-Heinz (* 1951), German cyclist
- Öberg, Andreas (* 1978), Swedish jazz musician
- Oberg, August Heinrich (1809–1872), German lawyer, member of the Frankfurt National Assembly
- Oberg, Carl (1853–1923), German physician
- Oberg, Carl (1897–1965), German SS and police leader, perpetrator of the Holocaust, war criminal
- Öberg, Carl-Göran (* 1938), Swedish ice hockey player
- Oberg, Eduard (1858–1917), German lawyer
- Öberg, Elvira (* 1999), Swedish biathlete
- Öberg, Hanna (* 1995), Swedish biathlete
- Öberg, Hans (1926–2009), Swedish ice hockey player
- Øberg, Henry (1931–2011), Norwegian football referee
- Öberg, Jennie (* 1989), Swedish cross-country skier
- Oberg, Kalervo (1901–1973), American anthropologist of Finnish origin
- Oberg, Lars (* 1979), German politician (SPD), MdA
- Öberg, Marcus (* 1982), Swedish Thai boxer and K-1 fighter
- Oberg, Matt (* 1976), American actor
- Oberg, Matthias X. (* 1969), German director and screenwriter
- Oberg, Metta von (1737–1794), German muse of Augusta Louise zu Stolberg-Stolberg
- Öberg, Peter (* 1980), Swedish orienteer
- Öberg, Prawitz (1930–1995), Swedish football player
- Öberg, Sigfrid (1907–1949), Swedish ice hockey player
- Oberg, Uwe (* 1962), German pianist and composer
- Obergethmann, Johannes (1862–1921), German railway engineer and university lecturer
- Obergfell, Stefan (* 1960), Catholic religious and from 2013 to 2019 Provincial of the Central European Province of the Oblates (OMI)
- Obergföll, Boris (* 1973), German javelin thrower
- Obergföll, Christina (* 1981), German javelin thrower
- Oberguggenberger, Michael (* 1953), Austrian mathematician
- Oberguggenberger, Viktor (1893–1963), Austrian astronomer
- Oberhaidacher, Walther (1896–1945), Austrian politician (NSDAP), MdR, Gauleiter
- Oberhaidinger, Georg (* 1945), Austrian politician (SPÖ), member of the state parliament, member of the national council
- Oberhaim, Christoph von , Austrian nobleman and sub-marshal of Austria under the Enns
- Oberhammer, Aloys (1900–1983), Austrian state official and politician (ÖVP), member of the National Council
- Oberhammer, Bruno (* 1946), Austrian composer, organist and music teacher
- Oberhammer, Gerhard (* 1929), Austrian Indologist
- Oberhammer, Giulio (* 1935), Italian ice hockey player
- Oberhammer, Johann (1879–1956), Austrian politician, member of the state parliament
- Oberhammer, Oliver (* 1972), Austrian soccer player and coach
- Oberhammer, Otto (* 1934), Austrian administrative lawyer and ORF general manager
- Oberhammer, Paul (* 1965), Austrian lawyer and university professor
- Oberhammer, Vinzenz (1901–1993), Austrian art historian
- Oberhänsli-Widmer, Gabrielle (* 1957), Swiss Judaist
- Oberhaus, Norbert (* 1961), German founder and managing director of Cologne on pop GmbH
- Oberhaus, Wilhelm (1902–1942), German Roman Catholic priest, victim of National Socialism
- Oberhausen, Erich (1927–1997), German nuclear medicine specialist
- Oberhausen, Volker (* 1959), German politician (CDU)
- Oberhauser, David (* 1990), French soccer player
- Oberhauser, Edwin (1926–2019), Austrian monument protector, author and local historian
- Oberhauser, Elmar (* 1947), Austrian television journalist
- Oberhauser, Fred (1923–2016), German literary critic, editor of literary guides and radio journalist
- Oberhäuser, Georg (1798–1868), German optician
- Oberhauser, Josef (1915–1979), German SS man, member of the SS skull and crossbones associations
- Oberhauser, Karl (1932–2015), Italian politician (South Tyrol)
- Oberhauser, Martin (* 1970), Austrian singer, actor and cabaret artist
- Oberhauser, Norbert (* 1972), Austrian radio and television presenter
- Oberhauser, Rudolf (1852–1929), Austrian opera singer (baritone)
- Oberhauser, Rudolf (1926–2008), Austrian geologist
- Oberhauser, Sabine (1963-2017), Austrian politician (SPÖ)
- Oberheid, Heinrich Josef (1895–1977), National Socialist Protestant theologian
- Oberheide, Christoph (* 1989), German amateur actor
- Oberheiden, Tom (* 1976), German swimmer
- Oberheim, Ludwig (1808–1863), German Protestant pastor and politician
- Oberhelman, Doug (* 1952), American manager
- Oberhettinger, Fritz (1911–1993), German-American mathematician
- Oberheuser, Herta (1911–1978), German doctor in the Ravensbrück concentration camp
- Oberhey, Christian (1818–1905), German Evangelical Lutheran theologian
- Oberhof, Johannes (1905–1987), German Protestant clergyman
- Oberhofer, Albert (1925–2016), Austrian engineer, business economist and university lecturer
- Oberhofer, Dominik (* 1980), Austrian hotelier and politician (NEOS)
- Oberhofer, Harald (* 1983), Austrian economist
- Oberhofer, Herbert , German mountaineer
- Oberhofer, Karin (* 1985), Italian biathlete
- Oberhofer, Tamara (* 1982), Italian politician (South Tyrol)
- Oberhoff, Ernst (1906–1980), German painter, sculptor and graphic artist
- Oberhoff, Paul (1884–1960), German painter, graphic artist and composer
- Oberhoffer, Emil (1867–1933), German-American conductor, composer and music teacher
- Oberhoffer, Franz von (1838–1920), Prussian infantry general, quartermaster general and chief of the regional survey
- Oberhoffer, Heinrich (1824–1885), Luxembourg composer, music theorist and organist
- Oberhoffer, Karl (1811–1885), Austrian opera singer (baritone)
- Oberhoffner, Jens (* 1972), German politician (AfD), MdL
- Oberhoffner, Ute (* 1961), German luge athlete
- Oberhollenzer, Günther (* 1976), Italian art historian, author and curator (South Tyrol)
- Oberhollenzer, Josef (* 1955), Italian author (South Tyrol)
- Oberholser, Arron (* 1975), American golfer
- Oberholser, Harry Church (1870–1963), American ornithologist
- Oberholze, René (* 1963), Swiss writer
- Oberholzer, Andri (* 1996), Swiss athlete
- Oberholzer, Basil (* 1990), Swiss politician (GPS)
- Oberholzer, Bernhard (* 1985), Swiss track and road cyclist
- Oberholzer, Daniela , Swiss table tennis player
- Oberholzer, Emil (1883–1958), Swiss psychiatrist and psychoanalyst
- Oberholzer, Niklaus (* 1940), Swiss art historian
- Oberholzer, Norbert , Swiss yodeler, yodel and brass music conductor
- Oberholzer, Paul (* 1968), Swiss Jesuit
- Oberhorner, Traudl (* 1936), German-Austrian folk actress
- Oberhuber, Konrad (1935–2007), Austrian art historian and long-time director of the Albertina
- Oberhuber, Oswald (1931–2020), Austrian painter, sculptor and graphic artist
- Oberhummer, Eugen (1859–1944), German geographer
- Oberhummer, Heinz (1941–2015), Austrian physicist
- Obering, Andreas (* 1964), German comedian and actor
- Oberkamp, Carl von (1893–1947), German officer, SS brigade leader and major general of the Waffen SS
- Oberkamp, Franz Joseph von (1710–1767), physician
- Oberkampf, Christophe-Philippe (1738–1815), French cloth manufacturer of German origin
- Oberkampf, Jakob Philipp (1714–1781), German-Swiss pioneer entrepreneur in textile dyeing and fabric printing
- Oberkanins, Ingrid (* 1964), Austrian jazz musician (percussion, vibraphone, composition)
- Oberkersch, Valentin (1920–2004), German author of publications on Yugoslav German history
- Oberkirch, Henriette von (1754–1803), friend of Princess Sophia Dorothea of Württemberg
- Oberkirchner, Sepp (1932–2018), Austrian politician (SPÖ), member of the state parliament and state councilor
- Oberklammer, Eckhard (* 1945), Austrian bank manager and local politician
- Oberkofler, Daniel (* 1988), Austrian ice hockey player
- Oberkofler, Gabriela (* 1975), Italian-German artist
- Oberkofler, Gerhard (* 1941), Austrian Marxist historian
- Oberkofler, Johann Baptist (1895–1969), South Tyrolean painter
- Oberkofler, Josef (1900–1959), Austrian Nazi functionary
- Oberkofler, Joseph Georg (1889–1962), Austrian lawyer, storyteller and poet
- Oberkogler, David (* 1974), Austrian actor
- Oberkrome, Willi (* 1959), German historian
- Öberl, Bartholomäus (1660–1742), German sculptor
- Öberl, Johann Caspar (1700–1767), baroque sculptor
- Oberlaender, Gustav (1867–1936), German-American entrepreneur and patron
- Oberland, Michael (1960-2015), German basketball player
- Oberländer, Adolf (1845–1923), German draftsman
- Oberländer, Adolf (1867–1923), Austrian architect
- Oberländer, Alfred (1857–1906), Austrian opera singer (tenor)
- Oberländer, Christian (* 1966), German Japanologist
- Oberländer, Doris (1903–1989), German sculptor
- Oberländer, Erwin (* 1937), German historian
- Oberländer, Felix Martin (1851–1915), German urologist
- Oberländer, Friedrich Eduard (1807–1879), German lawyer and politician
- Oberländer, Gerhard (1907–1995), German book illustrator
- Oberländer, Hans (1870–1942), German director, actor and dramaturge
- Oberländer, Hans Emil (1885–1944), German landscape and portrait painter
- Oberländer, Harry (* 1950), German poet and journalist
- Oberländer, Heinrich (1834–1911), German theater actor and acting teacher
- Oberländer, Heinrich (1909–2001), German screenwriter and actor
- Oberlander, Helmut (* 1924), German SS member
- Oberländer, Ilse (1938–2003), Austrian politician (SPÖ), member of the Federal Council
- Oberländer, Jörg (* 1964), German soccer player
- Oberländer, Leopold (1811–1868), German lawyer and politician
- Oberlander, Louis C. (* 1966), Bulgarian composer and multi-instrumentalist
- Oberländer, Lutz (* 1966), German author and monument protector
- Oberländer, Martin Gotthard (1801–1868), German lawyer and politician, MdL (Kingdom of Saxony), Saxon Interior Minister
- Oberländer, Maximilian von (1834–1898), German administrative and fiscal lawyer
- Oberländer, Moritz Jakob (1831–1905), Austrian textile entrepreneur
- Oberländer, Theodor (1905–1998), German agricultural scientist and politician (NSDAP, GB / BHE, FDP, CDU), Member of the Bundestag, Member of the Bundestag
- Oberländer, Werner (1921–2002), German soccer player
- Oberländer, William (1869–1946), German lawyer and politician
- Oberle, Bernhard (* 1946), German soccer player
- Oberle, Bruno (* 1955), Swiss environmental scientist, director of the Swiss Federal Office for the Environment
- Oberle, Emil (1889–1955), German soccer player
- Oberle, Karl (1874–1942), German Catholic clergyman, dean of the Deanery Alzey, local researcher
- Oberle, Karl (1925–2008), German lawyer and politician (CSU), MdL Bavaria
- Oberle, Wilhelm (1931–2018), German pharmacist and founder of the Wilhelm Oberle Foundation, a non-profit foundation
- Oberlehner, Peter (* 1960), Austrian politician (ÖVP), member of the Federal Council
- Oberleithner, Heinrich von (1851–1920), Austrian politician (DnP), member of the National Council
- Oberleithner, Max von (1868–1935), Austrian lawyer, cloth manufacturer, composer and conductor
- Oberleitner, Andreas (1786–1838), Austrian musician (mandolin, guitar), composer and civil servant
- Oberleitner, Andreas (1789–1832), Austrian Benedictine and orientalist
- Oberleitner, Ewald (* 1937), Austrian jazz musician
- Oberleitner, Johann (1894–1957), Austrian historian, archaeologist and museum director
- Oberleitner, Klaus (* 1967), Austrian music teacher, organist and choir director
- Oberleitner, Markus (* 1973), German soccer player
- Oberlercher, Reinhold (* 1943), right-wing extremist activist
- Oberli, Bettina (* 1972), Swiss film director and screenwriter
- Oberliesen, Rolf (* 1940), German educationalist and university professor
- Oberlik, Gustav Adolf (1905–1943), German politician (NSDAP), MdR
- Oberlin, Claudia (* 1979), Swiss long-distance runner
- Oberlin, Dimitri (* 1997), Swiss football player
- Oberlin, Gerhard (* 1950), German literary and cultural scientist, poet, storyteller and teacher
- Oberlin, Jeremias Jakob (1735–1806), French scholar and philologist
- Oberlin, Johann Friedrich (1740–1826), Protestant pastor, educator and social pioneer
- Oberlin, Russell (1928-2016), American countertenor
- Oberlin, Urs (1919–2008), Swiss writer
- Oberlin, Urs Viktor (1747–1818), Swiss politician
- Oberlindober, Hanns (1896–1949), German politician (NSDAP), MdR
- Oberlinger, Dorothee (* 1969), German recorder player
- Oberlinger, Wolfgang (* 1943), German architect and master organ builder
- Oberlinner, Lorenz (* 1942), German Catholic theologian (New Testament scholar)
- Oberloher, Albert (* 1962), German singer and entrepreneur
- Oberloskamp, Helga (* 1943), German lawyer and university professor, professor of civil law with a focus on family and youth law
- Obermaier, Albrecht (1912–2004), German naval officer, commander of the NATO command NAVBALTAP
- Obermaier, Franz , German diplomat
- Obermaier, Frederik (* 1984), German journalist, political scientist and book author
- Obermaier, Hannes (1923–1990), German journalist, "gossip reporter"
- Obermaier, Hugo (1877–1946), German archaeologist
- Obermaier, Louise (1878–1969), German operetta singer
- Obermaier, Sebastian (1934–2016), German Roman Catholic clergyman in Bolivia
- Obermaier, Stefan (* 1981), Austrian DJ and music producer
- Obermaier, Uschi (* 1946), German model and member of Commune 1
- Obermaier, Walter (* 1942), Austrian literary scholar, historian and Nestroy researcher, head of the Vienna Library in the City Hall
- Obermair, Erwin (1946–2017), Austrian amateur astronomer and asteroid discoverer
- Obermair, Gilbert (1934–2002), Austrian journalist and author of games, advice and hobby literature
- Obermair, Hannes (* 1961), Italian historian and archivist (South Tyrol)
- Obermair, Raphael (* 1996), German soccer player
- Obermair-Schoch, Hilde (1897–1970), German economist, chairwoman and senator (Bavaria)
- Oberman, Gustavo (* 1985), Argentine soccer player
- Oberman, Heiko Augustinus (1930–2001), Dutch church historian
- Oberman, Martin J. (* 1945), American lawyer and member of the American regulatory authority Surface Transportation Board
- Obermann, Christof (* 1963), German psychologist
- Obermann, Emil (1921–1994), German journalist, publicist, television presenter
- Obermann, Frank (1944–1995), German actor
- Obermann, Holger (* 1936), German soccer goalkeeper and ARD television reporter
- Obermann, Karl (1905–1987), German historian, professor at Humboldt University
- Obermann, Ralf (* 1963), German soccer player
- Obermann, René (* 1963), German manager
- Obermanns, Franz (1909–1982), German communist and Red Army scout
- Obermarzoner, Martin (* 1981), Italian cook (South Tyrol)
- Obermauer, Nikolaus (1920–2001), German boxer
- Obermayer, Adolf Max (1911–1976), German diplomat
- Obermayer, Arthur S. (1931–2016), American chemist, entrepreneur, genealogist
- Obermayer, Aurelie (1845–1922), Austrian teacher and writer
- Obermayer, Bastian (* 1977), German journalist and book author
- Obermayer, Carl (1811–1889), German banker
- Obermayer, Erich (* 1953), Austrian soccer player
- Obermayer, Helmut (1935–2015), Austrian basketball official and referee
- Obermayer, Isidor (1783–1862), German banker and railway pioneer
- Obermayer, Leopold (1892–1943), doctor of law, wine merchant, persecuted as a Jew and homosexual during the Nazi era
- Obermayr, Adele (1894–1972), Austrian politician (SPÖ), member of the state parliament, member of the Federal Council
- Obermayr, Franz (* 1952), Austrian politician (FPÖ), MEP
- Obermayr, Franz Xaver (1817–1891), German Catholic clergyman and politician (center), MdR
- Obermayr, Helmut (* 1949), Austrian lawyer, journalist and former broadcast director
- Obermayr, Karl (1931–1985), Bavarian folk actor
- Obermayr, Mathias (1720–1799), German plasterer and sculptor
- Obermayr, Richard (* 1970), Austrian writer
- Obermeier, Dieter (1936–2017), German politician (STATT party), Member of the Bundestag
- Obermeier, Franz (* 1946), German politician (CSU), Member of the Bundestag
- Obermeier, Julia (* 1984), German politician (CSU), Member of the Bundestag
- Obermeier, Julius (1867–1936), German businessman
- Obermeier, Manuela (* 1970), German writer
- Obermeier, Otto (1843–1873), German doctor and bacteriologist
- Obermeier, Otto (1883–1958), German graphic artist, painter and illustrator
- Obermeier, Otto-Peter (* 1941), German philosopher and university professor
- Obermeier, Siegfried (1936–2011), German non-fiction and novelist
- Obermeier, Thomas (* 1964), German politician (CSU), MdL
- Obermeir, Daniela (* 1959), German theater and film actress, director, acting teacher and acting coach
- Obermeyer, Arne (* 1984), German actor and voice actor
- Obermeyer, Karl (1874–1955), German politician (SPD), MdR
- Obermeyer, Klaus (* 1919), German-American textile entrepreneur
- Obermeyer, Leonhard (1924–2011), German engineer and honorary professor
- Obermiller, Jewgeni Jewgenjewitsch (1901–1935), Russian orientalist, Tibetologist, Sanskritist and Buddhologist
- Obermiller, Julius Rudolf (1873–1930), German chemist
- Obermöller, Heiko (* 1974), German actor, voice actor, singer and puppeteer
- Obermoser, Brigitte (* 1976), Austrian ski racer
- Obermoser, Johann (1894–1981), Austrian politician (VF / ÖVP), Provincial Councilor and President of the Landtag in Tyrol
- Obermoser, Johann (* 1954), Austrian architect
- Obermoser, Jörg (* 1943), German racing car driver
- Obermoser, Josef (* 1959), Austrian antique dealer
- Obermoser, Michael (* 1967), Austrian politician (ÖVP), member of the Salzburg state parliament
- Obermoser, Stephanie (* 1988), Austrian sports shooter
- Obermüller, Benedikt (1930–2005), German ski racer
- Obermüller, Gerhard (1912–1995), German athlete and journalist
- Obermüller, Henriette (1817–1893), revolutionary from Baden and women's rights activist
- Obermüller, Johanna (* 1938), Romanian-German artist
- Obermüller, Karola (* 1977), German composer
- Obermüller, Klara (* 1940), Swiss journalist, writer and television presenter
- Obermüller, Mathias (1787–1855), Bavarian lawyer and politician
- Obermüller, Patrick (* 1999), Austrian soccer player
- Obermüller, Ralf (* 1958), German soccer player
- Obermüller, Wilhelm (1809–1888), German lay historian and lay linguist
- Obermüllner, Adolf (1833–1898), Austrian painter
- Obernberg, Ignaz Joseph von (1761–1845), German administrative officer and local historian
- Obernburg, von , minstrels of the Middle Ages
- Obernburger, Johannes († 1552), chief secretary of the office of Emperor Karl V.
- Obernburger, Peter († 1586), Imperial Court Councilor
- Oberndorfer, Benedikt (1912–1977), Austrian abbot of Lambach Monastery (1956–1964)
- Oberndörfer, Dieter (* 1929), German political scientist
- Oberndorfer, Hans (1925–2006), German astronomer, book author and long-time director of the Bavarian People's Observatory in Munich
- Oberndorfer, Martha (* 1962), Austrian manager
- Oberndorfer, Peter (* 1942), Austrian lawyer and emeritus university professor
- Oberndorfer, Peter (* 1956), German automobile racing driver
- Oberndorfer, Siegfried (1876–1944), German pathologist and anatomist and university professor
- Oberndorfer, Stefan (* 1959), German entrepreneur and racing car driver
- Oberndorff, Alfred von (1870–1963), German diplomat
- Oberndorff, Franz Albert Leopold von (1720–1799), Minister of the Palatinate and governor of the Elector
- Oberndorff, Maria von (1867–1940), German writer
- Oberndorfinger, Julia (* 1980), Austrian production designer
- Oberneder, Marzell (1891–1985), German teacher, musician and local poet
- Obernetter, Johann Baptist (1840–1887), German chemist, photo chemist and printer
- Oberneyer, Michael (* 1962), German officer, Brigadier General of the Bundeswehr
- Oberniedermayr, Anton (1899–1986), German pediatric surgeon
- Obernitz, Albert von (1804–1879), Prussian major general
- Obernitz, Eberhard von (1854–1920), Prussian officer, most recently major general
- Obernitz, Hanns Günther von (1899–1944), German officer, SA leader and politician (NSDAP), MdR
- Obernitz, Hugo von (1819–1901), Prussian general of the infantry
- Obernitz, Moritz August von (1743–1823), Prussian major general
- Obernitz, Moritz von (1785–1870), Prussian great agrarian and officer
- Obernitz, Sybille von (* 1962), German politician, senator in Berlin
- Obernosterer, Dagmar (* 1959), Austrian songwriter
- Obernosterer, David (* 1989), Austrian badminton player
- Obernosterer, Engelbert (* 1936), Austrian writer
- Obernosterer, Gabriel (* 1955), Austrian politician (ÖVP), member of the National Council and former natural track tobogganist
- Obernosterer, Manfred (* 1957), Austrian musician, composer and cabaret artist
- Obernosterer, Markus (* 1990), Austrian football player
- Oberoi, Harjot , Asian researcher and university professor
- Oberoi, Vivek (* 1976), Indian actor
- Oberon, Merle (1911–1979) British actress
- Oberparleiter, Karl (1886–1968), Austrian economist
- Oberpichler, Zepp (* 1967), German musician and author
- Oberpriller, Hannes (* 1957), German marksman
- Oberrauch, Herkulan (1728–1808), South Tyrolean Franciscan, philosopher and Catholic moral theologian
- Oberrauch, Max (* 1984), Italian ice hockey player
- Oberrauch, Paul (1890–1954), Swiss architect
- Oberrauner, Petra (* 1965), Austrian politician (SPÖ), member of the National Council
- Oberreit, Jakob Andreas Hermann (1777–1856), Saxon major general and cartographer
- Oberreiter, Johann (1807–1865), Austrian appointed mayor of Werfen and Lebzelter, murderer
- Oberreiter, Thomas (* 1966), Austrian diplomat
- Oberreuter, Heinrich (* 1942), German political scientist
- Oberritter, Dirk (* 1972), German soccer player
- Oberröder, Wolfgang (* 1942), German author, priest and university professor
- Obers, Carlos (* 1940), German advertising designer
- Oberschall, Anthony (* 1936), American sociologist
- Oberschall, Johann Matthäus (1688–1755), German sculptor
- Oberschelp, Arnold (* 1932), German mathematician, logician and university professor
- Oberschelp, Friedrich (1895–1986), German conductor and choir director
- Oberschelp, Jürgen (* 1938), German conductor, choir director and teacher
- Oberschelp, Klaus (* 1946), German soccer player
- Oberschelp, Malte (* 1968), German non-fiction author
- Oberschelp, Reinhard (* 1936), German historian and librarian
- Oberschelp, Walter (* 1933), German mathematician and computer scientist
- Oberschlick, Gerhard (* 1942), Austrian publicist
- Obersiebrasse, Fritz (* 1940), German athlete
- Oberson, Sarah (* 1980), Swiss woman who went missing in 1985 at the age of five
- Oberson, Swann (* 1986), Swiss swimmer
- Colonel, Bill Jr. (born 1965), American actor
- Colonel, Conor (* 1980), American independent musician
- Colonel, Eugene (1901-1991), American track and field athlete
- Colonel, Marco (* 1996), Austrian soccer player
- Colonel, Maximilian (1849–1925), German surgeon and university professor
- Colonel, Werner (* 1891), Prussian district administrator
- Oberstar, Jim (1934-2014), American politician (Democratic Party)
- Oberste, Jörg (* 1967), German historian
- Oberste, Walter (* 1933), German sprinter
- Oberste-Berghaus, Günther (1895–1950), German architect
- Oberste-Brink, Karl (1885–1966), German geologist, mining expert and paleontologist
- Obersteg, Karl Johann Im (1849–1926), Swiss entrepreneur and collector
- Oberstein, Andreas von (1533–1603), aristocratic canon and important reformer in the Principality of Speyer
- Oberstein, Simone (* 1979), German singer
- Obersteiner, Heinrich (1847–1922), Austrian neurologist
- Obersteiner, Johann (1824–1896), Austrian composer and organist
- Obersteiner, Ludwig (1857-1896), Austrian genre painter
- Obersteller, Andreas (* 1953), German ministerial official
- Obersteller, Bernhard (1889–1972), German politician (GB / BHE), MdL
- Oberstolz, Christian (* 1977), Italian tobogganist
- Oberstolz-Antonova, Anastasia (* 1981), Italian luge rider
- Obert, Anthony (* 1985), French ski racer
- Obert, Claudia (* 1961), German reality TV participant and entrepreneur
- Obert, Franz (1828–1908), Transylvanian-Saxon Protestant theologian, writer, school reformer and politician
- Obert, Günter (1926–2017), German administrative lawyer
- Obert, Michael (* 1966), German journalist and book author
- Obertan, Gabriel (* 1989), French football player
- Obertas, Julija Nikolajewna (* 1984), Russian figure skater
- Obertelli, Alexandre (* 1978), French nuclear physicist
- Oberteufer, Johann Georg (1750–1819), Swiss doctor and politician
- Oberteufer, Johann Heinrich (1779–1841), Swiss doctor and politician
- Oberth, Adolf (1928–2007), German chemist and inventor
- Oberth, Hermann (1894–1989), German physicist and space pioneer
- Oberthür, Charles (1845–1924), French entomologist
- Oberthür, François-Charles (1818–1893), French publisher and printer
- Oberthür, Franz (1745–1831), German Roman Catholic theologian
- Oberthür, Henri Joseph (1887–1983), French entomologist and surgeon
- Oberthür, Rainer (* 1961), German theologian and author
- Oberthür, René (1852–1944), French entomologist
- Oberthür, Theodor (1891–1966), German politician (CDU), MdL
- Oberti, Guido (1907–2003), Italian civil engineer
- Oberto II of Biandrate , Italian crusader of the fourth crusade, regent of Thessaloniki
- Oberto, Fabricio (* 1975), Argentine basketball player
- Obertone, Laurent (* 1984), French journalist and author
- Obertos de Valeto, Álvaro (1427–1482), Spanish nobleman and juror of Jerez
- Obertuck, Gwen (* 1980), American singer
- Obertüschen, Karl (1828–1873), German Mayor of the city of Mülheim an der Ruhr (1857–1873)
- Oberück, Hermine (* 1951), German photographer and photo journalist
- Oberwalder, Hannes (* 1967), Austrian music producer, keyboard player and pianist
- Oberwalder, Louis , Austrian educator, adult educator and publicist
- Oberweger, Giorgio (1913–1998), Italian discus thrower
- Oberweinmar, Jobst von († 1526), knight, imperial councilor and envoy under Maximilian I and owner of the Falkenstein rule in Upper Austria
- Oberweis, Marc (* 1982), Luxembourg soccer player
- Oberwinder, Heinrich (1845–1914), social democratic politician and journalist
- Oberwinkler, Franz (1939–2018), German mycologist
- Oberwittler, Dietrich (* 1963), German sociologist and criminologist
- Oberzaucher, Alfred , Austrian dance scholar and ballet dramaturge
- Oberzaucher, Elisabeth (* 1974), Austrian behavioral biologist
- Oberzaucher, Ludwig (1881–1957), Austrian politician (SPÖ)
- Oberzaucher-Schüller, Gunhild (* 1942), Austrian dance scholar
- Obes, Lucas José (1782–1838), Uruguayan politician
- Obeso Rivera, Sergio (1931–2019), Mexican clergyman and Roman Catholic Archbishop of Jalapa
- Obeso, Candelario (1849-1884), Colombian writer
- Obeth, Josef (1874–1961), German sculptor
- Obetsebi-Lamptey, Emmanuel (1902–1963), Ghanaian politician
- Obetsebi-Lamptey, Jacob Okanka (1946–2016), Ghanaian politician
- Obex-Mischitz, Ines (* 1965), Austrian politician (SPÖ), member of the state parliament
- Obexer, Linus (* 1997), Swiss football player
- Obexer, Maxi (* 1970), German-Italian writer
- Obey, André (1892–1975), French playwright, author and playwright
- Obey, Dave (* 1938), American politician
- Obey, Ebenezer (* 1942), Nigerian musician and evangelist
Obh
- Obhođaš, Safeta (* 1951), Bosnian writer
- Obholzer, Anton (* 1968), British rower
- Obholzer, Rupert (* 1970), British rower
- Obholzer, Walter (1953–2008), Austrian painter
Obi
- Obi, Ashanti (* 1952), Nigerian sprinter
- Obi, Chris (* 1970), British-Nigerian actor
- Obi, Joel (* 1991), Nigerian soccer player
- Obi, Thomas (* 1932), Nigerian sprinter and hurdler
- Obiang Nguema Mangue, Teodoro (* 1969), Equatorial Guinean politician
- Obiang Nguema Mbasogo, Teodoro (* 1942), Equatorial Guinean politician, President (since 1979)
- Obiang, Pedro (* 1992), Spanish-Equatorial Guinean soccer player
- Obid, Yodgor (* 1940), Uzbek poet
- Obiditsch, Fritz (1926–2013), German sociologist
- Óbidos, Josefa de (1630–1684), Portuguese painter
- Obiefuna, Albert Kanene (1930–2011), Roman Catholic clergyman and archbishop
- Obiekwu, Kingsley (* 1974), Nigerian football player and coach
- Obiena, Ernest (* 1995), Philippian pole vaulter
- Obier, Max (* 1859), German worker and politician (SPD), MdL
- Obier, Oskar (1876–1952), German impressionist
- Obiero, Mercy Apondi (* 1978), Kenyan weightlifter
- Obiesie, Joshua (* 2000), German basketball player
- Obieta, Francisco (* 1957), Argentine double bass player and composer
- Obikwelu, Francis (* 1978), Portuguese sprinter of Nigerian origin
- Obilalé, Kodjovi (* 1984), Togolese football goalkeeper
- Obilić, Miloš († 1389), murderer of Sultan Murad I.
- Obina (* 1983), Brazilian soccer player
- Obinger, Herbert (* 1970), Austrian political scientist and professor at the University of Bremen
- Obinna Chukwunyelu, Eric (* 1981), Nigerian soccer player
- Obinna, Anthony John Valentine (born 1946), Nigerian clergyman, Archbishop of Owerri
- Obinna, Victor (* 1987), Nigerian soccer player
- Obiols i Germà, Raimon (* 1940), Spanish politician (PSC), MEP
- Obiols i Tramullas, Marià (1809–1888), Catalan conductor, composer and music teacher
- Obiols, Francesc (* 1975), Andorran football player
- Obioma, Chigozie (* 1986), Nigerian writer
- Obiong, Juliana (* 1966), Equatorial Guinean sprinter
- O'Bir, Jon (* 1984), British DJ and producer
- Obirek, Stanisław (* 1956), Polish theologian, historian, cultural anthropologist, former Jesuit monk
- Obiri, Hellen (* 1989), Kenyan middle and long distance runner
- Obisesan, Queen (* 1982), Nigerian hammer thrower
- Obispo, Armando (* 1999), Dutch football player
- Obispo, Pascal (* 1965), French pop singer
- Obitz, Gábor (1899–1953), Hungarian football player and coach
- Obitz, Kurt (1907–1945), German veterinarian, parasitologist and publicist
- Obizzo II. D'Este († 1293), Margrave and Signor of Ferrara
- Obizzo III. d'Este (1294–1352), Lord of Ferrara and Modena
Obj
- Objartel, Georg (* 1940), German specialist in German
Obk
- Obkircher, Hermann (1819–1881), German lawyer and politician from Baden
- Obkircher, Josef (1783–1854), lawyer and politician from Baden
- Obkircher, Natalie (* 1971), Italian luge rider
- Obkircher, Rudolf (1859–1916), German lawyer and politician (NLP), MdR
Obl
- Obladen, Marei (1941–2020), German radio play author and reviewer
- Obladen, Wolfgang (1924–2000), German politician (CDU)
- Oblak, Branko (* 1947), Yugoslav football player
- Oblak, Jaka (* 1986), Slovenian ski jumper
- Obłąk, Jan (1913–1988), Polish Catholic clergyman, Bishop of Warmia
- Oblak, Jan (* 1993), Slovenian football player
- Oblak, Lenart (* 1991), Slovenian biathlete
- Oblak, Marijan (1919–2008), Yugoslav or Croatian clergyman, Archbishop of Zadar
- Oblasser, Caroline (* 1977), Austrian publisher and author
- Oble, Jacqueline , Ivorian politician
- Obleitner, Johannes (1893–1984), Austrian sculptor and painter
- Obleitner, Karl junior (* 1929), Austrian sculptor and painter
- Oblemenco, Ion (1945-1996), Romanian football player and coach
- Obleser, Friedrich (1923–2004), German lieutenant general and air force inspector
- Obliers, Thomas (* 1967), German soccer coach
- Obligado, Carlos (1890–1949), Argentine writer and translator
- Obligado, Pedro Miguel (1892–1967), Argentine writer
- Obligado, Rafael (1851–1920), Argentine writer
- Oblinger, Alexander (* 1989), German ice hockey player
- Oblinger, Helmut (* 1973), Austrian canoeist
- Oblinger-Peters, Violetta (* 1977), Austrian canoeist
- Obljakow, Ivan Sergejewitsch (* 1998), Russian football player
- Obłój, Krzysztof (* 1954), Polish economist and university professor
Obm
- Obmochayev, Alexei Alexandrovich (* 1989), Russian volleyball player
Obo
- Oboabona, Godfrey (* 1990), Nigerian soccer player
- Obodas III. († 9 BC), King of the Nabataeans
- Obode, Efe Jerry (* 1989), Nigerian soccer player
- Obodo, Christian (* 1984), Nigerian soccer player
- Obodo, Ernest (* 1966), Nigerian clergyman, Roman Catholic auxiliary bishop in Enugu
- Obodowskaja, Raissa Andrejewna (1948–2012), Soviet track cyclist
- Obojes, Franz Anton (* 1961), Austrian goldsmith, painter and graphic artist
- Obolenskaja, Alexandra Alexejewna (1831–1890), Russian nobleman, advocate of women's education in Russia, school founder and patron
- Obolenskaja, Vera Apollonovna (1911–1944), Russian resistance fighter of the Resistance
- Obolensky, Alexander Petrovich (1780–1855), Russian officer and politician
- Obolensky, Iwan Michailowitsch (1853–1910), Governor General of Finland
- Obolensky, Evgeni Petrovich (1796–1865), Russian prince, guard officer in the Imperial Russian Army and Decembrist
- Obolensky, Leonid Leonidowitsch (1873–1930), Soviet diplomat
- Obolensky, Leonid Leonidowitsch (1902–1991), Russian-Soviet cameraman, film director and actor
- Obolensky, Nikolai Petrovich (1790–1847), imperial Russian officer and holder of the order Pour le mérite
- Obolensky, Valerian Valerianowitsch (1887–1938), Russian revolutionary and Soviet economic leader
- Obolensky, Vasily Petrovich (1780–1834), Major General of the Russian Empire
- Obolensky, Chloé (* 1942), Greek stage and costume designer
- Oboler, Arch (1907–1987), American playwright, screenwriter, writer, film producer, and director
- Obolgogiani, Oliver (* 1990), Georgian-Finnish ice hockey player
- Óbolo, Mauro Iván (* 1981), Argentinian football player
- Obomsawin, Alanis (* 1932), American-Canadian documentary filmmaker and artist
- Obonya, Cornelius (* 1969), Austrian actor
- Obonya, Hanns (1922–1978), Austrian actor
- Oborin, Lev Nikolaevich (1907–1974), Soviet pianist
- Oborny, Catherine (* 1979), Austrian actress
- Oborski, Ludwik (1789–1873), Polish officer and revolutionary
- Obot, Ephraim Silas (1936–2009), Roman Catholic Bishop of Idah, Nigeria
- Obote, Milton (1924–2005), Ugandan politician, President of Uganda
- Obote, Miria (* 1936), Ugandan politician
- Obour, Grace (* 2001), Ghanaian sprinter
- Oboussier, Robert (1900–1957), Swiss composer and music critic
- O'Boye, Joe (* 1960), English-Irish snooker player
- O'Boyle, Patrick Aloysius (1896–1987), American clergyman, Archbishop of Washington, and Cardinal
Obr
- Obracht-Prondzyński, Cezary (* 1966), Polish sociologist, anthropologist and historian
- Obrador i Soler, Jaume Antoni (1748–1803), Spanish theologian and author
- Obradors, Fernando (1897–1945), Spanish composer
- Obradors, Jacqueline (* 1966), American actress
- Obradović, Aleksandar (* 1956), Yugoslav writer
- Obradović, Dositej († 1811), Serbian writer, philosopher, educator and educator
- Obradović, Goran (* 1976), Serbian football player
- Obradović, Iva (* 1984), Serbian rower
- Obradović, Ivan (* 1988), Serbian football player
- Obradović, Milan (* 1977), Serbian football player and coach
- Obradovic, Oliver (* 1986), Austrian boxer
- Obradović, Saša (* 1969), Serbian basketball player and coach
- Obradović, Vladimir (* 1981), Serbian tennis player
- Obradović, Željko (* 1960), Serbian basketball player
- Obradowitsch, Sergei Alexandrowitsch (1892–1956), Russian-Soviet writer
- O'Brady, Colin (* 1985), American extreme athlete
- Obraniak, Ludovic (* 1984), Polish football player
- Obraszow, Sergei Wladimirowitsch (1901–1992), Russian puppeteer
- Obraszow, Wassili Parmenowitsch (1849–1920), Russian-Ukrainian doctor and internist
- Obraszowa, Jelena Wassiljewna (1939–2015), Russian opera singer
- Obrębski, Józef (1906–2011), Polish clergyman, honorary citizen of the Vilnius district municipality
- Obrecht, André (1899–1985), French executioner
- Obrecht, Bettina (* 1964), German author for children and young people
- Obrecht, Edmond (1852–1935), Roman Catholic clergyman and Trappist abbot
- Obrecht, Georg (1547–1612), German cinematographer and professor of law
- Obrecht, Hermann (1882–1940), Swiss politician (FDP)
- Obrecht, Jacob († 1505), Franco-Flemish composer, singer and cleric of the Renaissance
- Obrecht, Manfred (* 1958), Swiss conductor, trumpeter and concert organizer
- Obrecht, Michael (* 1951), German trainer and former athlete in the field of figure skating
- Obrecht, Nico (* 1996), Swiss floorball player
- Obrecht, Werner (* 1942), Swiss social scientist and university professor
- Obree, Graeme (born 1965), Scottish cyclist
- Obregón Cano, Ricardo (1917–2016), Argentine politician
- Obregón Santacilia, Carlos (1896–1961), Mexican architect
- Obregón Serrano, Lamberto H. , Mexican Ambassador
- Obregón, Alejandro (1920–1992), Spanish-Colombian painter
- Obregón, Álvaro (1880–1928), General and President of Mexico
- Obregón, Darlenys (* 1986), Colombian sprinter
- Obendet, Téa (* 1985), American writer
- Obreimow, Iwan Wassiljewitsch (1894–1981), Russian physicist
- Obreja, Rudel (* 1965), Romanian boxer
- Obreno, Hannes (* 1991), Belgian rower
- Obrenović, Aleksandar (1876–1903), King of Serbia (1893–1903)
- Obrenović, Mihailo (1823–1868), Serbian prince
- Obrenović, Miloš (1780–1860), Serbian prince
- Obresa, Peter (* 1960), German ice hockey player and coach
- Obreschkow, Nikola (1896–1963), Bulgarian mathematician
- Obrestad, Annette (* 1988), Norwegian poker player and web video producer
- Obretenow, Georgi († 1876), Bulgarian revolutionary and freedom fighter
- O'Brian, Hugh (1925-2016), American actor
- O'Brian, Jack (1914-2000), American journalist
- O'Brian, Patrick (1914-2000), British writer and translator
- O'Brien Moore, Ainsworth (1897–1936), American classical philologist
- O'Brien, Alan (born 1985), Irish football player
- O'Brien, Alex (* 1970), American tennis player
- O'Brien, Andrea (* 1967), German author and literary translator
- O'Brien, Andy (* 1979), Irish football player
- O'Brien, Anne, 2nd Countess of Orkney († 1756), Scottish-British noblewoman
- O'Brien, Austin (* 1981), American film actor
- O'Brien, Barbara (* 1950), American politician
- O'Brien, Bill (born 1969), American football coach
- O'Brien, Brendan (* 1960), American music producer, sound engineer and musician
- O'Brien, Brendan Michael (* 1943), Canadian clergyman and emeritus Roman Catholic Archbishop of Kingston
- O'Brien, Callum (* 1982), New Zealand squash player
- O'Brien, Caragh , American writer
- O'Brien, Catherine Amelia (1881–1963), Irish glass painter
- O'Brien, Cathy (* 1957), American writer
- O'Brien, Charles FX (1879–1940) American politician
- O'Brien, Chris (1881–1951) American football official
- O'Brien, Conan (born 1963), American television presenter and entertainer
- O'Brien, Conor Cruise (1917–2008) Irish politician, MEP and journalist
- O'Brien, Dan (* 1966), American decathlete and Olympic champion
- O'Brien, Danny (* 1969), English technology journalist
- O'Brien, Darcy (1939-1998), American writer
- O'Brien, Darragh (* 1974), Irish politician
- O'Brien, Dave (1912–1969), American filmmaker
- O'Brien, Dave (born 1962), Canadian ice hockey player
- O'Brien, Davey (1917–1977) American football player and 1938 Heisman Trophy winner
- O'Brien, Dean (* 1990), South African tennis player
- O'Brien, Denis (1837–1909), American lawyer and politician
- O'Brien, Dominic (* 1957), British memory athlete and non-fiction author
- O'Brien, Donald (1930-2003), Irish-French actor
- O'Brien, Dylan (born 1991), American actor
- O'Brien, Edmond (1915–1985), American actor
- O'Brien, Edna (born 1930), Irish writer
- O'Brien, Edward (1914–1976), American track and field athlete
- O'Brien, Edwin Frederick (* 1939), American clergyman, Archbishop of Baltimore, Cardinal to the Curia, Grand Master of the Order of the Holy Sepulcher in Jerusalem
- O'Brien, Eugene (* 1964), British racing car driver
- O'Brien, Fergal (born 1972), Irish snooker player
- O'Brien, Fergus (1930-2016), Irish politician
- O'Brien, Fitz-James (1828-1862), Irish writer
- O'Brien, Floyd (1904–1968), American jazz trombonist
- O'Brien, Francis (born 1943), Irish politician
- O'Brien, George (1899–1985), American actor
- O'Brien, George D. (1900–1957), American politician
- O'Brien, George M. (1917–1986), American politician
- O'Brien, Hod (1936–2016), American modern jazz pianist
- O'Brien, Ian (born 1947), Australian swimmer
- O'Brien, James (1841–1907) American politician
- O'Brien, James (1925-1988), Canadian sprinter
- O'Brien, James H. (1860–1924), American politician
- O'Brien, James Joseph (1930-2007), British clergyman, auxiliary bishop in the Archdiocese of Westminster
- O'Brien, Jay (1883-1940), American bobsledder
- O'Brien, Jeremiah (1778-1858), American politician
- O'Brien, Jim (* 1989), American ice hockey player
- O'Brien, Joan (born 1936), American actress and singer
- O'Brien, Joey (* 1986), Irish football player
- O'Brien, Johann von (1775-1830), Austrian military leader
- O'Brien, John (1960–1994), American author
- O'Brien, John (born 1977), American football player
- O'Brien, John A. , American politician
- O'Brien, John Ambrose (1885–1968), Canadian industrialist and sports official in the NHA
- O'Brien, John F. († 1927), American businessman and politician
- O'Brien, John P. (1873–1951) American politician
- O'Brien, Joseph († 1945), American film producer, film director and film editor
- O'Brien, Joseph J. (1897–1953), American politician
- O'Brien, Kate (1897–1974) Irish writer
- O'Brien, Kate (* 1988), Canadian track cyclist
- O'Brien, Katharine , American director and screenwriter
- O'Brien, Katie (* 1986), British tennis player
- O'Brien, Keith Patrick (1938-2018), British theologian, Archbishop of Saint Andrews and Edinburgh and Cardinal of the Roman Catholic Church
- O'Brien, Kelland (* 1998), Australian cyclist
- O'Brien, Kerry (* 1946), Australian athlete and world record holder
- O'Brien, Kieran (born 1973), British actor
- O'Brien, Kristine (* 1991), American rower
- O'Brien, Larry (1917–1990), American politician, manager, third commissioner of the NBA
- O'Brien, Larry (* 1949), Canadian politician, 58th Mayor of Ottawa
- O'Brien, Leo W. (1900–1982), American politician
- O'Brien, Leslie, Baron O'Brien of Lothbury (1908–1995), British banker and finance manager
- O'Brien, Liam (1913–1996), American screenwriter and producer
- O'Brien, Liam (* 1976), American dubbing actor, screenwriter, dubbing director
- O'Brien, Margaret (born 1937), American actress
- O'Brien, Mark (* 1984), Canadian actor
- O'Brien, Mark (* 1987), Australian cyclist
- O'Brien, Mark (born 1992), Irish football player
- O'Brien, Mary, 3rd Countess of Orkney († 1791), British noblewoman
- O'Brien, Maureen (born 1943), British actress and writer
- O'Brien, Michael (1948-2015), British historian
- O'Brien, Michael (born 1965), American swimmer
- O'Brien, Michael J. (* 1950), American archaeologist and anthropologist
- O'Brien, Murrough, 1st Earl of Thomond († 1551), last King of Thomond and first Earl of Thomond
- O'Brien, Murrough, 1st Marquess of Thomond (1726–1808), Irish-British nobleman and politician
- O'Brien, Nina (* 1997), American ski racer
- O'Brien, Olivia (* 1999), American singer and songwriter
- O'Brien, Oscar (1892–1958), Canadian arranger, composer, organist, pianist and music teacher
- O'Brien, Paidi (* 1984), Irish cyclist
- O'Brien, Parry (1932-2007), American shot putter and Olympic champion
- O'Brien, Pat (1899-1983), American film actor
- O'Brien, Pat (born 1948), Canadian politician
- O'Brien, Patrick, 2nd Baronet (1823–1895), Irish politician
- O'Brien, Paul (* 1966), English singer, songwriter and instrumentalist
- O'Brien, Peter (born 1960), Australian actor
- O'Brien, Philadelphia Jack (1878–1942) American light heavyweight boxer
- O'Brien, Rebecca (* 1957), British film producer
- O'Brien, Richard (* 1942), English actor, author and composer
- O'Brien, Robert (1908–1987), American racing car driver
- O'Brien, Robert C. (1918–1973), American writer and journalist
- O'Brien, Robert C. (* 1966), American attorney and security advisor to the US President
- O'Brien, Ruairí (* 1962), Irish architect, lighting designer and artist
- O'Brien, Sean (born 1987) Irish rugby union player
- O'Brien, Shane (* 1960), New Zealand rower
- O'Brien, Shane (born 1983), Canadian ice hockey player
- O'Brien, Shaun (* 1969), Australian cyclist
- O'Brien, Shauna (* 1970), American actress and model
- O'Brien, Sheila (1902–1983), American costume designer
- O'Brien, Skip (1950–2011), American actor
- O'Brien, Soledad (* 1966), American journalist
- O'Brien, Spencer (* 1988), Canadian snowboarder
- O'Brien, Terry (* 1943), American luge rider
- O'Brien, Thomas J. (1878–1964), American politician
- O'Brien, Thomas J. (1935-2018), American clergyman, Roman Catholic Bishop of Phoenix
- O'Brien, Thomas Kevin (1923-2004) English Catholic bishop
- O'Brien, Tim (born 1946), American author
- O'Brien, Tim (* 1954), American bluegrass musician
- O'Brien, Timothy (1787–1862) Irish merchant and politician
- O'Brien, Vanessa (* 1964), British-American mountaineer and former finance manager
- O'Brien, William (1852–1928) Irish journalist and politician
- O'Brien, William (1918-1994) Irish politician (Fine Gael)
- O'Brien, William David (1878–1962), American clergyman, auxiliary bishop in Chicago
- O'Brien, William J. (1836–1905) American politician
- O'Brien, William L. (* 1951), American lawyer and politician
- O'Brien, William Smith (1803–1864) Irish nationalist politician
- O'Brien, William Smith (1862–1948), American politician
- O'Brien, William X. (1881–1968) Irish politician and trade unionist
- O'Brien, William, 4th Earl of Inchiquin (1700–1777), Irish-British nobleman and politician
- O'Brien, Willis (1886–1962), American animation technician
- O'Brien-Coker, SK , Gambian judge
- O'Brien-Docker, Ian (* 1977), German pop-rock musician
- O'Brien-Docker, John (1938-2017), British musician, songwriter, arranger and band leader
- O'Brien-Kelly, Maeve (born 1930), Irish author
- Obrig, Ilse (1908–1978), German radio editor, presenter and author of children's books
- Obrist, Alexandra (* 1993), Italian natural track tobogganist
- Obrist, Aloys (1867–1910), German musicologist, bandmaster and conductor
- Obrist, Christian (* 1980), Italian athlete
- Obrist, Emile (1870–1954), Swiss entrepreneur and politician
- Obrist, Franz (* 1965), Italian natural track tobogganist
- Obrist, Hans Ulrich (* 1968), Swiss curator and author
- Obrist, Hermann (1862–1927), German sculptor and co-founder of Art Nouveau
- Obrist, Johann Georg (1843–1901), Austrian philologist, author and teacher
- Obrist, Johann Joseph , German sculptor
- Obrist, Jürg (* 1947), Swiss graphic artist and writer
- Obrist, Patrick (* 1993), Austrian ice hockey player
- Obrist, Patrick (* 1994), Swiss floorball player
- Obrist, Robert (* 1958), Swiss politician (Greens)
- Obrist, Willy (1918–2013), Swiss doctor and psychologist
- Obritzhauser, Hertha (* 1960), Austrian badminton player
- Obrovac, Tamara (* 1962), Croatian jazz musician (vocals, flute, composition)
- Obrovská, Jana (1930–1987), Czech composer and music editor
- Obrovský, Jakub (1882–1949), Czechoslovakian painter, sculptor, graphic artist and writer
- O'Browne, August Agbola (1895–1976), Polish-British jazz musician and fighter of the Polish Home Army (Armia Krajowa)
- Obrusnik, Tessa (* 1993), German actress
- Obruchev, Nikolai Nikolajewitsch (1830–1904), Russian general
- Obruchev, Vladimir Afanassjewitsch (1863–1956), Soviet geologist, geographer and writer
- Obrutschka, Fritz (1894–1956), Austrian hotelier and politician (ÖVP), member of the National Council
- Obry, Hugues (* 1973), French sword fencer and Olympic champion
- O'Bryan (born 1961), American singer and songwriter
- O'Bryan, Ronald Clark (1944-1984), American poisoner
- O'Bryan, Sean (born 1963), American actor
- O'Bryant, Jimmy (1896–1928), American jazz musician and band leader
Obs
- Obschernikat, Werner (* 1955), German water polo player
- Obscherningkat, Herbert (1911–1991), German journalist and film producer
- Obschlager, Walter (* 1943), Swiss Germanist
- Obsequens, Iulius , Roman writer
- Obser, Karl (1860–1944), German historian and archivist
- Obsieger, Robert (1884–1958), Austrian sculptor and ceramicist
- Obst, Adolf (1869–1945), German painter
- Obst, Andreas (* 1996), German basketball player
- Obst, Arthur (1866–1936), German teacher and journalist
- Obst, Dietmar (* 1940), German actor and radio play speaker
- Obst, Erich (1886–1981), German geographer and geopolitician
- Obst, Fritz Jürgen (1939–2018), German herpetologist
- Obst, Georg (1873–1938), German professor for business administration
- Obst, Helmut (* 1940), German religious scholar
- Obst, James (* 1990), Australian poker player
- Obst, Julia (* 1992), German-Brazilian actress
- Obst, Julius , German sculptor
- Obst, Kristin (* 1983), German politician (CDU), MdL Thuringia
- Obst, Lynda (* 1950), American film producer and writer
- Obst, Michael (* 1944), German rower
- Obst, Michael (* 1955), German composer and pianist
- Obst, René (* 1977), German racing cyclist
- Obst, Seweryn (1847–1917), Polish painter and ethnographer
- Öbster, Ernst (* 1984), Austrian soccer player
- Obstfeld, Maurice (* 1952), American economist
- Obstfelder, Hans von (1886–1976), German infantry general in World War II
- Obstfelder, Sigbjørn (1866–1900), Norwegian writer and poet
- Obšut, Jaroslav (* 1976), Slovak ice hockey player
Obt
- Obtresal, Robert (1880–1915), Austrian painter
Obu
- Ōbu, Shun (* 1992), Japanese soccer player
- Obua, David (* 1984), Ugandan soccer player
- Obuch, Gerhard (1884–1960), German socialist politician and lawyer
- Obuch, Hans-Heinrich (1949–2016), German journalist
- Obuchi, Keizō (1937–2000), 54th Prime Minister of Japan
- Obuchi, Yūko (* 1973), Japanese politician
- Obuchow, Alexander Michailowitsch (1918–1989), Russian mathematician and physicist
- Obuchow, Dmitri Alexejewitsch (* 1983), Russian ice hockey player
- Obuchow, Igor (* 1969), Soviet-Belarusian cross-country skier
- Obuchow, Nikolai Borissowitsch (1892–1954), Russian composer
- Obuchow, Pawel Matwejewitsch (1820–1869), Russian mining engineer and metallurgist
- Obuchow, Viktor Timofejewitsch (1898–1975), Soviet Colonel General
- Obuchowa, Nadeschda Andrejewna (1886–1961), Russian-Soviet opera singer
- Obungu, Wilson (* 1984), Kenyan soccer goalkeeper
- Obure, Chris (* 1943), Kenyan politician
- Oburu Asue, Alfred Maria (1947-2006), Roman Catholic Bishop of Ebebiyin
- Obute, Lydia (* 1993), Austrian model
Obv
- Obviar, Alfredo (1889–1978), Filipino clergyman, Roman Catholic bishop of Lucena
Obw
- Obwaller, Hans-Peter (* 1971), Austrian racing cyclist
- Obwegeser, Hugo (1920–2017), Austrian oral surgeon
- Obwexer, Walter (* 1965), Italian-Austrian legal scholar
- Obwurzer, Herbert von (1888–1945), Austrian officer and SS brigade leader
Oby
- O'Byrn, Georg von (1864–1942), Saxon major general and head of cabinet
- O'Byrne, Brían F. (born 1967), Irish actor
- O'Byrne, Patrick (born 1955), Irish pianist
- O'Byrne, Paul John (1922-2004) Canadian clergyman, Roman Catholic Bishop of Calgary
- O'Byrne, Ryan (* 1984), Canadian ice hockey player
Obz
- Obžera, Branislav (* 1981), Slovak football player
- Obziler, Tzipora (* 1973), Israeli tennis player
- Obzina, Jaromír (1929–2003), communist functionary and Czechoslovak politician
- Obzina, Martin (1905–1979), American production designer and art director