Small (family name)
The family name small originated as a nickname (property name) probably after the body size or after characteristics that come from the earlier meaning of the word small . It meant little in Middle High German : pure, fine, clever astute, petite, pretty, nice, tender, thin, thin, thin, ugly, weak, small. Kleini had the following meanings in Old High German : shiny, smooth, clean, careful, dainty, thin, slight, little. There is a linguistic relationship with the English word clean .
Variants and compositions
To small there are the variants Kleine , Kleiner , Kleinecke , Kleinke , Kleinmann and Kleinert . Kleinová is a Czech female surname.
Klein appears as the first part of the name in several combinations, for example in Kleinfeld , Kleinhans and Kleinpeter (the younger Hans or Peter), Kleinknecht , Kleinschmidt (locksmith) and Kleinwächter .
frequency
The family name Klein is in 15th position on the list of the most common family names in Germany . It is the most common German family name that is not derived from a job title . Around 57,000 families in Germany and Austria bear this name. It is particularly common in Saarland and Rhineland-Palatinate . But the name Klein is also worn by families in countries such as Romania, Russia, Spain, France and America.
Name bearer
A.
- AJ Klein (born 1991), American football player
- Abraham Klein (physicist) (1927–2003), American physicist
- Abraham Klein (referee) (* 1934), Israeli football referee
- Adam Wilhelm Klein (1922–2015), German insurance manager and university professor
- Adolf von Klein (1805-1892), Württemberg general staff doctor and natural scientist
- Adolf Klein (banker) (1844–1916), Austrian banker and industrialist
- Adolf Klein (actor) (1847–1931), Austrian actor and theater director
- Aika Klein (* 1982), German short tracker
- Albert Klein (entrepreneur) (1881–1962), German entrepreneur
- Albert Klein (Bishop) (1910–1990), German clergyman, bishop in Romania
- Albert Klein (literary scholar) (1939–2017), German literary scholar and university professor
- Albert Klein von Wisenberg (1807–1877), Austrian entrepreneur
- Alexander Klein (1879–1961), German and Israeli architect
- Alexandra-Maria Klein (* 1972), German biologist and university professor
- Alfons Klein (artist) (1905–1983), German painter and sculptor
- Alfons Klein (administrative officer) (1909–1946), German Nazi perpetrator
- Alfons Klein (politician) (1926–1984), German politician (CDU)
- Alfons Klein (clergyman) (1929–2015), German Jesuit and author
- Alfons Klein (philologist) (* 1935), German philologist
- Alfred Klein (1915–2003), German economist and university professor
- Alfred Klein (SS member) (1912–1972), German SS main squad leader
- Allen Klein (1931–2009), American music manager
- Andrea Berger-Klein (* 1961), German political scientist and university lecturer
- Andreas Klein (film producer) (* 1962), German film producer and entrepreneur
- Andreas Klein (theologian) (* 1967), Austrian Protestant theologian
- Andreas Klein (cabaret artist) , German cabaret artist
- Andreas Klein (actor) , German theater and film actor
- Andreas Klein (voice actor ) , German voice actor and radio play speaker
- Angelika Klein (* 1951), German politician (Die Linke)
- Anna Klein (1883–1941), German painter and graphic artist
- Anna Frank-Klein (1894–1977), German-Israeli painter
- Anne Klein (1950–2011), German lawyer, LGBT activist and politician
- Anne Klein (fashion designer) (1923–1974), American fashion designer
- Anne Brüggemann-Klein (* 1956), German computer scientist and university professor
- Anne C. Klein (* 1947), American religious scholar
- Anneliese Klein (* 1941), Austrian politician (FPÖ)
- Annette Klein (* 1962), German diplomat
- Ansgar Sebastian Klein (* 1966), German historian
- Anton von Klein (1746–1810), German Jesuit, linguist and poet
- Anton Klein (politician) (1775-1853), German politician
- Anton Klein (church historian) (1788–1867), Austrian priest and church historian
- Anton Klein (book printer) (1830–1901), Austrian book printer
- Armin Klein (politician, 1922) (1922–2009), German politician (CDU), Lord Mayor of Bad Homburg vor der Höhe
- Armin Klein (politician, 1939) (* 1939), German politician (CDU), MdL Hessen
- Armin Klein (cultural scientist) (* 1951), German cultural scientist
- Arnd Klein-Zirbes (* 1970), German association official
- Arnold Klein (1945–2015), American dermatologist
- Arthur Klein (physician) (1863–1930), Austrian internist
- Arthur George Klein (1904–1968), American politician
- Astrid Klein (* 1951), German painter, graphic artist, designer and photographer
- August Klein (entrepreneur) (1810–1897), German entrepreneur
- August Klein von Ehrenwalten (1824–1890), German-Austrian entrepreneur
- August Carl Klein (1847–1920), German politician, mayor of Saarbrücken
- Augusta Klein (1866–1943), English writer
- Axel Klein (social anthropologist) (* 1961), German social anthropologist
- Axel Klein (musicologist) (* 1962), German musicologist
- Axel Klein (chemist) (* 1964), German chemist
- Axel Klein (Japanologist) (* 1968), German Japanologist
B.
- Barbara Klein (actress) (* 1942), German actress
- Barbara Klein (director) (* 1954), Austrian theater founder and director
- Beat Klein (* 1956), Swiss artist, see Hendrikje Kühne and Beat Klein
- Beate Hartinger-Klein (* 1959), Austrian manager and politician
- Benedikt Klein (* 1980), German specialist in German
- Benjamin Klein (* 1943), American economist
- Bernat Klein (1922–2014), Serbian-British textile designer and painter
- Bernd Klein (mechanical engineer) (* 1947), German mechanical engineer and author
- Bernd Klein (Author) (* 1958), German businessman, author, alleged faith healer and conspiracy theorist
- Bernhard Klein (sculptor) (before 1596 – after 1614), German stone sculptor and plasterer
- Bernhard Klein (1793–1832), German composer
- Bernhard Klein (architect) (* 1953), German architect and urban planning historian
- Berthold Klein (* 1941), German politician (SPD)
- Bettina Klein (* 1966), German radio editor and presenter
- Bill Klein (* 1948), American entrepreneur and poker player
- Birgit Klein (* 1962), German rabbi and writer
- Bruno Klein (art historian) (* 1957), German art historian
- Bruno Maria Klein (1891–1968), Austrian entomologist and scientific illustrator
- Brydan Klein (* 1989), Australian tennis player
C.
- Calvin Klein (* 1942), American fashion designer
- Carl Klein (mineralogist) ( Johann Friedrich Carl Klein ; 1842–1907), German mineralogist
- Carl Klein (architect) ( Karl Klein ; 1873–1934), German architect and first state curator of the Saarland
- Carl Friedrich Klein (1803–1884), German textile manufacturer
- Caspar Klein (1865–1941), German clergyman, Archbishop of Paderborn
- Catharina Klein (1861–1929), German painter
- César Klein (1876–1954), German painter and set designer
- Charles Klein ( playwright ) (1867–1915), English playwright and actor
- Charles Klein (director) ( Friedrich Carl Klein ; 1898–1981), German writer, screenwriter and director
- Chico Klein (* 1952), Austrian filmmaker
- Chris Klein (* 1979), American actor
- Christian Klein (medic) (1740–1815), German medic
- Christian Klein (major general) (1850–1938), German major general
- Christian Klein (composer) (* 1967), German composer
- Christian Klein (pharmacist) , German pharmacist and university professor
- Christian Klein (literary scholar) (* 1974), German literary scholar
- Christian Klein (politician) (* 1979), German politician (CDU)
- Christian Klein (Manager) (* 1980), German Manager (SAP)
- Christian Klein (athlete) (* 1983), German middle-distance runner
- Christian Benjamin Klein (1754–1825), German organist and cantor
- Christina Klein , maiden name of LaFee (* 1990), German singer
- Christine Klein (neurologist) (* 1969), German neurologist
- Christine Klein (actress) (* 1968), German actress
- Christoph von Klein († 1815), Austrian field marshal lieutenant
- Christoph Klein (theologian) (* 1937), Romanian-German clergyman, bishop in Romania
- Christoph Klein (physician) (* 1964), German pediatrician
- Chuck Klein (1904-1958), American baseball player
- Claudia Klein (* 1944), German writer, see Claudia Keller
- Claudia Klein (soccer player) (* 1971), German soccer player and trainer
- Claudia Tiggemann-Klein (* 1970), German historian and archivist
- Cosmo Klein (* 1978), German singer and songwriter
D.
- Dani Klein (* 1953), Belgian singer
- David Klein (singer) (1816-1884), German opera singer (bass).
- David Klein (economist) (* 1935), Israeli economist and bank manager
- David Klein (composer) (* 1961), Swiss musician and composer
- David Klein (cameraman) (* 1972), American cameraman
- David Klein (soccer player) (* 1973), French soccer player and coach
- David Klein (chess player) (* 1993), Dutch chess player
- Dennis Klein (Director) , American film director
- Dennis Klein (journalist) , German journalist
- Dennis A. Klein , American university professor
- Dieter Klein (economist) (* 1931), German Marxist economist
- Dieter Klein (actor) , German actor and voice actor
- Dieter Klein (politician) (1936–2002), German politician (PDS)
- Dieter Klein (publisher) (1936-2010), German publisher
- Dieter Klein (art historian) (* 1942), Austrian art historian
- Dieter Klein (basketball player) (* 1964), German basketball player
- Dietmar Klein (* 1956), German film director and screenwriter
- Dominik Klein (* 1983), German handball player
- Dominique Klein (* 1981), German basketball player
- Dominique Louis Antoine Klein (1761–1845), French general and politician, see Louis Klein (General)
- Dorothea Klein (1903–1951), German art historian
E.
- Eckart Klein (* 1943), German legal scholar
- Edmund Klein (1922–1999), American medic
- Edmunda Klein (1898–1995), German nun
- Eduard Klein (1923–1999), German writer
- Eduard Klein (entrepreneur) (1837–1901), German mine manager and politician, MdR
- Eduard Emmanuel Klein ( Edward Emanuel Klein ; 1844–1925), Hungarian-British medic and bacteriologist
- Edwin Klein (* 1948), German athlete and writer
- Edwin Adolar Klein (1874–1944), German politician and district administrator
- Eitel Klein (1906–1990), German painter
- Elie Klein (* 1989), Israeli ice hockey player
- Emil Klein (painter) (1865–1943), German-American painter
- Emil Klein (doctor) (1873–1950), German-Austrian doctor
- Emil Klein (poet) (1899–1980), dialect poet
- Emil Klein (author) , German teacher and author
- Emil Klein (politician) (1905-2010), German politician (NSDAP)
- Emil Klein (musician) (1955–2004), Romanian cellist
- Engelbert Klein (1797–1830), Austrian entrepreneur
- Engelbert Klein (publisher) (1906 – after 1965), German publisher
- Erich Klein (officer) (* 1928), officer in the Austrian Armed Forces
- Erich Klein (botanist) (1931–2016), Austrian chemist and botanist
- Erich Klein (racing driver) (* 1959), Austrian motorcycle racing driver
- Erich Klein (journalist) (* 1961), Austrian journalist, publicist and translator
- Erik S. Klein (1926–2002), German actor
- Ernst Klein (journalist) (1876–1951), Austrian journalist and writer
- Ernst Klein (ethnologist) ( Ernst Immanuel Klein ; 1887–1937), Swedish writer and ethnologist
- Ernst Klein (resistance fighter) (1900–1964), German resistance fighter
- Ernst Klein (historian) (1923-2004), German historian
- Ernst Ferdinand Klein (1744–1810), Prussian lawyer
- Erwin Klein (entrepreneur) (1924–1983), Austrian entrepreneur
- Erwin Klein (table tennis player) (around 1939–1992), American table tennis player
- Eva Klein (* 1925), Hungarian-Swedish cancer researcher
- Eva Klein (soccer player) (* 1977), Faroese soccer player
- Eva Klein-Donath (1898 – after 1960), German actress
- Ewald Klein (1899–1942), German resistance fighter
- Ezra Klein (* 1984), American author
F.
- Felipe Klein (* 1987), Brazilian soccer player
- Felix Klein (1849–1925), German mathematician
- Félix Klein (1862–1953), French priest, theologian and author
- Felix Klein (diplomat) (* 1968), German lawyer and diplomat
- Felix Klein-Franke (* 1935), German orientalist and Islamic scholar
- Ferdinand Klein (* 1934), German educational scientist and university professor
- Ferdinand Heydrich Klein (1827–1903) German businessman, politician and sculptor, see Ferdinand Heydrich
- Florian Klein (* 1986), Austrian soccer player
- Francis Joseph Klein (1911–1968), Canadian clergyman, Bishop of Calgary
- Frank Klein (* 1966), German disc jockey
- Franz Klein (painter) (see Franz Cleyn ; 1582–1658), German painter, draftsman, etcher and tapestry artist
- Franz Klein (sculptor) (1777-1840), Austrian sculptor
- Franz Klein (entrepreneur) (1800–1855), Austrian building contractor
- Franz Klein (trade inspector) (1852–1899), Austrian trade inspector and geodesist
- Franz Klein (politician) (1854–1926), Austrian lawyer and politician
- Franz Klein (homeland researcher) (1919–2008), chairman of the country team of the Banat Swabians in Austria
- Franz Klein (legal scholar) (1929–2004), German tax law scholar
- Franz Klein-Bruckschwaiger (1912–1976), Austrian lawyer and agricultural scientist
- Franz Klein von Wisenberg (1825–1882), German entrepreneur
- Franz Eugen Klein (1912–1944), Austrian conductor, composer and pianist
- Fred Klein (1898–1990), Dutch painter
- Frederick Augustus Klein (1827–1903), Alsatian missionary, orientalist and archaeologist
- Frieda Klein (1944–1963), German fatality on the inner-German border
- Friedhelm Klein (* 1940), German officer and military historian
- Friedrich Klein (entrepreneur) (1805–1898), German iron industrialist
- Friedrich Klein (clergyman) (1894–1946), German pastor
- Friedrich Klein (politician) (1899–1961), German politician (SPD), MdL Rhineland-Palatinate
- Friedrich Klein (legal scholar) (1908–1974), German legal scholar and university professor
- Friedrich Klein (engineer) (* 1939), German engineer, metallurgist and university professor
- Friedrich Klein-Blenkers (lawyer) (* 1958), German legal scholar and university professor
- Friedrich Klein-Chevalier (1861–1938), German painter
- Friedrich August Klein (1793–1823), German clergyman, theologian and university professor
- Friedrich Carl Klein (entrepreneur) , German entrepreneur, founder of Carlshütte (Dautphetal)
- Friedrich Carl Klein , birth name of Charles Klein (director) (1898–1981), German writer, screenwriter and director
- Friedrich Emil Klein (1841–1921), German painter
- Fritz Klein (company founder) (1863–1923), Swiss entrepreneur, founder and director of the Helvetia sewing machine factory.
- Fritz Klein (captain) (1877–1958), German military
- Fritz Klein (entrepreneur, 1882) (1882–1953), German businessman and entrepreneur
- Fritz Klein (physician) (1888–1945), Romanian-German concentration camp doctor
- Fritz Klein (entrepreneur, 1889) (1889–1972), German entrepreneur, founder of Schneekoppe (company)
- Fritz Klein (journalist) (1895–1936), German journalist
- Fritz Klein (resistance fighter) (1898–1944), German resistance fighter
- Fritz Klein (lepidopterist) (1904–1983), German butterfly researcher and collector
- Fritz Klein (SA member) (1908–1966), German SA standard leader
- Fritz Klein (sports official) (1909–1996), German lawyer and sports official
- Fritz Klein (historian) (1924–2011), German historian
- Fritz Klein (bi-activist) (1932-2006), American psychiatrist and therapist
- Fritz Klein (sports journalist) (1937–2014), German sports journalist
- Fritz Klein-Blenkers ( Friedrich Karl Klein-Blenkers ; 1924-2015), German economist
- Fritz Heinrich Klein (1892–1977), Austrian composer
G
- Gabriele Klein (* 1957), German sociologist
- Gabriele Wesch-Klein (* 1956), German ancient historian and epigraphist
- Gary Klein (musician) (1933–2009), American jazz musician
- Gary Klein (songwriter) (* 1942), American songwriter and music producer
- Gary Klein (* 1959), American entrepreneur and bicycle designer, see Klein (bicycle)
- Gary A. Klein (* 1942), American psychologist
- Georg Klein (Gestapo) (1895–1966), German lawyer, Gestapo employee and SS leader
- Georg Klein (biologist) (1925–2016), Hungarian-Swedish oncologist and cell biologist
- Georg Klein (writer) (* 1953), German writer
- Georg Klein (General) (* 1961), German officer
- Georg Klein (composer) (* 1964), German composer and media artist
- Georg Klein (volleyball player) (* 1991), German volleyball player
- Georg Michael Klein (1776–1820), German philologist, philosopher and university professor
- Georg O. Klein (1905–1969), German publicist and editor
- Georg Theodor Klein (pseudonym Karl Wild ; 1820–1865), German writer and poet
- Gérard Klein (writer) (also Gerhard Klein ; * 1937), French writer
- Gérard Klein (actor) (born 1942), French actor
- Gerda Weissmann-Klein (* 1924), Polish Holocaust survivor and author
- Gerhard Klein (writer) (1902– ??), German writer
- Gerhard Klein (director) (1920–1970), German film director and screenwriter
- Gerhard Klein (actor) (also Gershon Klein ; 1920–1999), German actor and cinema owner
- Gerhard Klein (pedagogue) (* 1932), German educational scientist and university professor
- Gerhard Klein (* 1937), French writer, see Gérard Klein (writer)
- Gerhard Klein (editor) (* 1953), Austrian theologian and radio editor
- Gerrit Klein (journalist) (* 1962), German journalist
- Gerrit Klein (actor) (* 1991), German actor and songwriter
- Gertrud Stephani-Klein (1914–1995), Romanian-German writer and publicist
- Gideon Klein (1919–1945), Czech composer and pianist
- Gisela Klein (actress) (1873-1919), Austrian actress
- Gisela Klein (athlete) (born 1950), German athlete
- Greta Klein-Hitpaß (* 2001), German volleyball and beach volleyball player
- Gudrun Klein (* 1943), German politician (SPD), MdL
- Günter Klein (politician, 1900) (1900–1963), German lawyer, administrative officer and politician (SPD)
- Günter Klein (composer) (1921-2010), German composer
- Günter Klein (theologian) (1928–2015), German theologian
- Günter Klein (politician, 1930) (1930–1998), German lawyer and politician (CDU), Member of the Bundestag
- Günter Klein (painter) (* 1943), German painter
- Günter Klein (sports journalist) (* 1962), German sports journalist
- Günter Klein (veterinarian) (1964–2016), German veterinarian and microbiologist
- Günther Klein (* 1956), German director, author and university lecturer
- Guillermo Klein (* 1969), Argentine jazz pianist
- Gustav Leopold Klein († 1862), German civil servant and politician
- Gyula Klein (botanist) ( Julius Klein ; 1844–1915), Hungarian botanist
- Gyula Klein (Rabbi) ( Julius Klein ; 1850–1895), Hungarian rabbi
H
- Hagen Klein (* 1949), German motorcycle racer
- Hanna Klein (cyclist) (* 1987), German mountain biker
- Hanna Klein (athlete) (* 1993), German athlete
- Hanna Schramm-Klein (* 1974), German economist and university professor
- Hannelore Klein , German soccer player
- Hanns Klein (1920–2001), German historian and archivist
- Hans Klein (arms dealer) (1879 – after 1957), German arms dealer
- Hans Klein (aviator) (1891–1944), German aviation officer
- Hans Klein (politician, 1904) (1904–1970), German politician (KPD / SED) and policeman
- Hans Klein (pathologist) (1912–1984), German pathologist and university professor
- Hans Klein (soccer player, I) , German soccer goalkeeper
- Hans Klein (soccer player, 1927) (* 1927), German soccer goalkeeper
- Hans Klein (politician, 1931) (1931–1996), German politician (CSU)
- Hans Klein (theologian) (* 1940), Transylvanian theologian
- Hans-Dieter Klein (* 1940), Austrian philosopher and university professor
- Hans Dieter Klein (* 1951), German photographer and author
- Hans-Friedrich Klein (* 1940), German chemist and university professor
- Hans-Gerd Klein (* 1958), German athlete
- Hans-Günter Klein (musicologist) (1939–2016), German musicologist and librarian
- Hans-Günter Klein (wrestler) (* 1954), German wrestler
- Hans-Günter Klein (show jumper) (* 1968), German show jumper
- Hans Günther Klein († 1997), German art dealer and collector
- Hans-Gunther Klein (1931–1982), German theater founder and director
- Hans-Heinrich Klein (1918–1992), German lieutenant general
- Hans Hugo Klein (* 1936), German politician (CDU) and judge
- Hans-Joachim Klein (sociologist) (* 1938), German sociologist
- Hans-Joachim Klein (swimmer) (* 1942), German swimmer and sports official
- Hans-Joachim Klein (terrorist) (* 1947), German terrorist
- Hans-Joachim Klein (computer scientist) (* 1951), German computer scientist
- Hans-Jürgen Klein (* 1952), German politician (Alliance 90 / The Greens)
- Hanspeter Klein (* 1939), German politician (CDU)
- Hans Peter Klein (* 1951), German biology didactic
- Hans Walter Klein (1942–2016), German actor
- Hans-Wilhelm Klein (1911–1992), German linguist and grammarian
- Harald Klein (* 1955), German diplomat
- Harald Klein (engineer) (* 1963), German engineer and university professor
- Harry Klein (musician) (1928-2010), British jazz musician
- Harry Klein (soccer player) (* 1958), German soccer player
- Hedi Klein (1908–1993), German singer (soprano)
- Heðin M. Klein (* 1950), Faroese teacher, poet and politician
- Hedwig Klein (1911–1942), German Arabist
- Heijo Klein ( Heinrich-Josef Klein ; * 1935/1936), German art historian
- Heinrich Klein (composer) (1756–1832), Austrian composer
- Heinrich Klein (manufacturer) (1803–1873), German manufacturer and councilor of commerce
- Heinrich Klein (singer) (1849 – after 1925), opera singer and artistic director
- Heinrich Klein (occultist) , German occultist
- Heinrich Klein (soccer player) , German soccer player
- Heinrich Klein (inventor) (1919–2011), German inventor of the goal wall
- Heinrich Klein (pedagogue) (* 1925), German pedagogue and university professor
- Heinrich Klein (politician) (1932–1989), German politician (SPD), Member of the Bundestag and Member of Parliament
- Heinrich Klein (biologist) (1953–2011), German biologist and zoo director
- Heinrich-Josef Klein (* 1935/1936), German art historian, see Heijo Klein
- Heinz Klein (author) , German handball teacher and author
- Heinz Klein-Arendt (1916–2005), German sculptor
- Heinz-Joachim Klein (1906–1998), German actor and theater director
- Heinz-Karl Klein (1940–2008), German-American information scientist and university professor
- Helga Klein , maiden name of Helga Erny (* 1931), German athlete
- Helmut Klein (pedagogue) (1930-2004), German pedagogue
- Helmut Klein (physician) (* 1941), German cardiologist and university professor
- Helmut Klein (literary scholar) (* 1945), German literary scholar
- Helmut Klein (photographer) (* 1945), Austrian photographer
- Helmut R. Klein (* 1942), German painter and draftsman
- Helmut Walter Klein (1918–2013), German artist
- Hendrikje Klein (* 1979), German politician (Die Linke)
- Henri Klein (track and field athlete) (1918 / 1919–2007), French track and field athlete
- Henri Klein (soccer player) (1944–1995), Luxembourg soccer player
- Herbert Klein (historian, 1900) (1900–1972), Austrian historian and regional archive director
- Herbert Klein (politician, 1903) (1903–1978), German politician (CDU), Member of the State of North Rhine-Westphalia
- Herbert Klein (swimmer) (1923-2001), German swimmer
- Herbert Klein (politician, 1930) (* 1930), American politician
- Herbert G. Klein (1918–2009), American political advisor
- Heribert Klein (1957–2005), German journalist and organist
- Herman Klein ( Hermann Klein ; 1856–1934), British music critic, singing teacher, and author
- Hermann Klein (1805–1889), Hungarian journalist and translator, see János Kilényi
- Hermann Klein (politician) (1878–1960), German local politician, member of the Nassau Municipal Parliament
- Hermann Klein (railway worker) (1904 – after 1964), German railway official, President of the Mainz Federal Railway Directorate
- Hermann Klein (local history researcher) (1935–2016), German local history researcher
- Hermann Joseph Klein (1844–1914), German astronomer and meteorologist
- Hermine Klein (before 1982 – before 1997), Austrian author
- Holger Klein (* 1969), German radio presenter
- Holger A. Klein (* 1971), German art historian
- Horst Klein (SS member) (1910 – after 1947), German administrative lawyer and SS leader
- Horst Klein (soccer player) (* 1948), German soccer player
- Horst Klein (illustrator) (* 1965), German graphic artist and illustrator
- Horst G. Klein (1944–2016), German Romance scholar and philologist
- Hubert Klein (1811–1856), Austrian entrepreneur, see Klein (family)
- Hubert Klein (soccer player) (* 1955), German soccer player
- Hubert Willi Klein (* 1949), German engineer
- Hugo Klein (journalist) (1853–1915), Hungarian journalist, writer, art critic and translator
- Hugo Klein (painter) (1873–1931), Austrian officer and painter
- Hugo Klein (politician) (* 1953), German politician (CDU), MdL Hessen
I.
- Inge Borde-Klein (1917–2006), German puppeteer and author
- Ingo Klein (* 1953), German economist, statistician and university professor
- Ingrid Klein (* 1941), Austrian church functionary
- Inocențiu Micu-Klein (1692–1768), Romanian-Greek clergyman, Bishop of Făgăraș
- Iris Klein (* 1967), German television actress and restaurateur
- Isabell Klein (* 1984), German handball player
- Ivo Klein (* 1961), Liechtenstein politician
J
- Jacob Klein (industrialist) (1869–1945), German industrialist
- Jacob Klein (philosopher) (1899–1978), German-American philosopher and mathematician
- Jacob Klein (Orientalist) (* 1934), Hungarian-American Orientalist
- Jacob Klein (chemist) (born 1949), British chemist
- Jacob Klein-Haparash (1897–1970), Ukrainian-Israeli journalist and writer
- Jacob Herman Klein (1688–1748), Dutch composer
- Jacob Theodor Klein (1685–1759), Polish-German lawyer, historian, mathematician, natural scientist and diplomat
- Jakob Klein (NSDAP) (1887– ??), German teacher and party functionary (NSDAP)
- Jakob Klein (entrepreneur) (1896–1969), German entrepreneur and press wholesaler
- Jan Klein (immunologist) (* 1936), Czech-American immunologist
- Janet Klein-Filbrich (* 1977), German biathlete
- Jean Klein (1912–1998), French spiritual teacher
- Jean-François Klein (1961–2018), Swiss civil engineer
- Jean-Georges Klein (* 1950), French chef
- Jean-Yves Klein (* 1960), German-Canadian painter
- Jennifer Klein (historian) , American historian
- Jennifer Klein (* 1987/1988), German athlete (high jump), see Jennifer Hartmann
- Jennifer Klein (soccer player) (* 1999), Austrian soccer player
- Jennifer Cardon Klein , American animator
- Jerome O. Klein (* 1931), American medic
- Jesper Klein (1944–2011), Danish actor
- Jim Klein , film editor, film director, film producer and documentary filmmaker
- Joachim Klein (actor) (1841–1909), German actor
- Joachim Klein (chemist) (* 1935), German chemist, biotechnologist and university professor
- Joachim Klein (Slavist) (* 1944), German Slavist and university professor
- Joachim Klein (lighting designer) (* 1963), German lighting designer
- Jochen Klein (1967–1997), German painter
- Joe Klein (* 1946), American journalist and author
- Johann von Klein (1659–1732), German lawyer and university professor
- Johann von Klein (General) († 1825), Austrian Major General
- Johann Klein (physician) (1788–1856), Austrian obstetrician and university professor
- Johann Klein (politician, I) , Moravian politician, member of the Austrian House of Representatives
- Johann Klein (glass painter) ( Johann Evangelist Klein ; 1823–1883), Austrian glass painter
- Johann Klein (politician, 1874) (1874–1956), German farmer and politician
- Johann Klein (politician, 1902) (1902–1976), German trade unionist and politician (CVP, CDU)
- Johann Adam Klein (1792–1875), German painter and etcher
- Johann Albrecht Klein (1698–1778), German astronomer
- Johann Baptist August Klein (1788–1831), German teacher and writer
- Johann Gottlieb Klein (1766– ??), German physician
- Johann Josef Klein (1832–1914), German teacher, textbook author and local history researcher
- Johann Michael Klein (1692–1767), German carpenter
- Johann Peter Klein (1812–1873), Luxembourg lawyer and politician
- Johann Samuel Klein (1748–1820), Slovak historian and theologian
- Johann Wilhelm Klein (1765–1848), German teacher for the blind
- Johannes Klein (theologian) (1604–1631), German theologian
- Johannes Klein (astronomer) (1684–1762), Czech astronomer, mathematician and mechanic
- Johannes Klein (Germanist) (1904–1973), German Germanist
- Johannes Werner Klein (1898–1984), German theologian and anthroposophist
- Jon Klein (* 1960), British guitarist
- Jörg Klein (soccer player) (* 1960), German soccer player
- Jörg Klein (Admiral) (* 1961), German flotilla admiral
- Josef Klein (chemist) (also Joseph Klein ; 1858–1928), German chemist
- Josef Klein (actor) (also Joseph Klein ; 1862–1927), Austro-German actor
- Josef Klein (composer) (1870–1933), Austrian composer and conductor
- Josef Klein (Nazi functionary) (1890–1952), German economist, football functionary and politician (NSDAP)
- Josef Klein (racing driver) (1904–1973), German motorcycle racing driver
- Josef Klein (hymn poet) (1913–2005), German clergyman and hymn poet
- Josef Klein (linguist) (* 1940), German linguist and politician (CDU)
- Josef Antonius Klein (1922–2002), German architect and painter
- Josef Engelbert Klein (1792–1830), Austrian entrepreneur, see Klein (family) #Second generation
- Josef K. Klein , real name of Gustav Heinse (1896–1971), Austrian-Bulgarian author
- Joseph Klein (theologian, 1748) (1748–1822), German theologian, clergyman and vicar general
- Joseph Klein (musician) (1802–1862), German music teacher and composer
- Joseph Klein (Rabbi) (1807–1873), German theologian and rabbi
- Joseph Klein (philologist) (1838–1899), German philologist
- Joseph Klein (entrepreneur) (1882–1961), Austrian-American entrepreneur
- Joseph Klein (theologian, 1896) (1896–1976), German theologian and philosopher
- Joseph Klein (composer) (* 1962), American composer and university professor
- Joseph Frederic Klein (1849–1918), French-American engineer
- Judith Klein (author) (* 1946), German author and translator
- Judith Klein (actress) (* 1972), German actress
- Julian Klein (* 1973), German composer and theater director
- Julian Klein von Diepold (1868–1947), German painter
- Juliane Klein (* 1966), German composer and publishing director
- Julien Klein (* 1988), French football player
- Julius Klein (1886–1961), American historian and economic advisor
- Julius Klein (lobbyist) (1901–1984), American general and lobbyist
- Julius Leopold Klein (1810–1876), German author and literary historian
- Jürgen Klein (sculptor) (1904–1978), German sculptor
- Jürgen Klein (Anglist) ( Jürgen August Walter Klein ; * 1945), German Anglist and literary scholar
- Jürgen Klein (soccer player) (1949-2006), German soccer player
- Jürgen Klein (painter) (* 1959), German painter
- Jürgen Klein (politician) (* 1973), German politician (AfD)
K
- Kacey Mottet Klein (* 1998), Swiss actor
- Karl Klein (priest) (1769–1824), German priest and publicist
- Karl Klein (historian) (1806–1870), German historian and writer
- Karl Klein (Bishop) (1819–1898), German clergyman, Bishop of Limburg
- Karl Klein (writer) (1838–1898), Alsatian theologian and writer
- Karl Klein (conservator) (1873–1934), German conservator
- Karl Klein (party official) (1886–1960), German party official and trade union official
- Karl Klein (murderer) (1901–1993), German politician and alleged murderer of police officers
- Karl Klein (theologian) (1912–2009), German theologian
- Karl Klein (trade unionist) (1949–2007), Austrian trade union official
- Karl Klein (politician) (* 1956), German politician, Member of the State Baden-Württemberg
- Karl Klein (soccer player) (* 1960), German soccer player
- Karl August von Klein (also Carl August von Klein ; 1794–1870), German composer, painter and writer
- Karl Christian Klein (also Carl Christian Klein ; 1772-1825), German surgeon and author
- Karl Egon Klein (1926–2018), German physician
- Karl-Heinz Klein (sculptor) (also Karl Heinz Klein ; * 1926), German sculptor
- Karl-Heinz Klein (boxer) (* 1947), German boxer
- Karl Kurt Klein (1897–1971), German linguist, theologian and historian
- Karsten Klein (* 1977), German politician (FDP)
- Katrin Klein , German actress
- Kellina Klein (* 1968), German actress and voice actress
- Kevin Klein (* 1984), Canadian ice hockey player
- Kit Klein (1910–1985), American speed skater
- Klaus Klein (biologist) , German human biologist and university professor
- Klaus Klein (boxer) (* 1942), German boxer
- Klaus Klein (soccer player) (* 1950), German soccer player
- Klaus Klein (Germanist) (* 1951), German Germanist and literary scholar
- Klaus-Wolfgang Klein (1933–1993), German physician and major general
- Konstantin Klein (* 1991), German basketball player
- Kurt Klein (1920–2002), American entrepreneur and author
- Kurt Klein (demographer) (* 1936), Austrian geographer, demographer and university lecturer
- Kutte Klein ( Kurt Klein ; * 1942), German rally driver and motorsport organizer
L.
- Larry Klein (* 1956), American music producer, songwriter and bass guitarist
- Laurentius Klein (1928–2002), German Benedictine, Abbot of St. Matthias
- Lawrence Klein (1920–2013), American economist
- Lene Klein (* 1912), German writer and translator
- Leo Klein von Diepold (1865–1944), German painter
- Leonie Renée Klein (* 1990), German actress
- Lev Samuilowitsch Klein (1927–2019), Soviet-Russian archaeologist, philologist and historian of science
- Libor Klein (1803–1848), Austrian entrepreneur, see Klein (family) #Second generation
- Lisa Klein (cyclist) (* 1996), German cyclist
- Lisa Klein (Author) , American author
- Loren Klein (born 1981 or 1982), American poker player
- Lothar Klein (* 1956), German politician
- Louis Klein (General) (1761-1845), French general
- Louis Klein (systems theorist) (* 1969), German economist, social scientist and systems theorist
- Ludwig von Klein (1813–1881), German railway engineer
- Ludwig Klein (botanist) (1857–1928), German botanist and university professor
- Ludwig Klein (mechanical engineer) (1868–1945), German mechanical engineer and university professor
- Ludwig Klein (politician) (1900–1959), Austrian politician (SPÖ)
- Ludwig Gottfried Klein (1716–1756), German physician
- Luise Klein (* 1999), German volleyball player
- Lutz Klein (* 1943), German politician (CDU)
- Ly Klein (1898–1968), German painter
M.
- Manfred Klein (politician, 1925) (1925–1981), German politician (CDU)
- Manfred Klein (journalist) (* 1929), German journalist and broadcast director
- Manfred Klein (typographer) (* 1932), German typographer
- Manfred Klein (soccer player) (1935-2004), German soccer player
- Manfred Klein (politician, 1936) (1936–2012), German politician (CDU)
- Manfred Klein (rower) (* 1947), German rower
- Manny Klein (1908–1994), American jazz trumpeter
- Manuel Klein (composer) (1876–1919), English-American composer and music director
- Manuel Klein (actor, 1977) (* 1977), German actor
- Manuel Klein (actor, 1980) (* 1980), German actor
- Manuela Klein (* 1974), German television presenter and journalist
- Marc Klein , screenwriter and director
- Marc Klein (medic) (1905–1975), French medic and Auschwitz survivor
- Marcus Klein (politician) (* 1976), German politician (CDU)
- Marcus Klein , birth name of Cosmo Klein (* 1978), German singer and songwriter
- Mareille Klein (* 1979), German director and screenwriter
- Margarete Klein , German political scientist
- Maria Klein , German table tennis player
- Maria Klein-Schmeink (* 1958), German politician (Bündnis 90 / Die Grünen), Member of the Bundestag
- Mark Klein , American whistleblower
- Markus Klein (* 1969), German sociologist and university professor
- Marlon Klein (* 1957), German musician and music producer
- Martin Klein (actor) (1846–1924), Austro-Hungarian theater actor
- Martin Klein (wrestler) (1884–1947), Estonian wrestler
- Martin Klein (author) (* 1962), German author
- Martin Klein (cook) (* 1976), French cook
- Martin Klein (musician) (* 1983), Austrian songwriter and pianist
- Martin J. Klein (1924–2009), American physicist and historian of science
- Martina Klein (* 1976), Argentine-Spanish model, actress and humorist
- Matthäus Klein (1911–1988), German philosopher
- Matti Klein (* 1984), German jazz musician
- Maury Klein (* 1939), American historian and author
- Max Klein (sculptor) (1847–1908), German sculptor
- Max Klein (judge) (1848–1910), German lawyer and judge
- Max Klein (politician) (1882–1957), Austrian politician (SDAP), member of the Lower Austrian state parliament
- Max Klein (physicist) (* 1951), German physicist and university professor
- Maximilian Klein von Diepold (1873–1949), German painter
- Melanie Klein (1882–1960), Austrian psychoanalyst
- Michael Klein (Manager) (* 1963), American manager
- Michael Klein (literary scholar) (1939–2020), German-Austrian literary scholar
- Michael Klein (artist) (* 1943), German sculptor
- Michael Klein (singer) (* 1947), German singer
- Michael Klein (addiction researcher) (* 1954), German psychologist and addiction researcher
- Michael Klein (writer) (* 1954), American writer
- Michael Klein (judge) (* 1945), German lawyer and judge
- Michael Klein (soccer player, 1959) (1959–1993), Romanian soccer player
- Michael Klein (actor) (* approx. 1963), German actor
- Michael Klein (theologian) (* 1964), German church historian
- Michael Klein (Science Manager) (* 1965), German science manager and historian
- Michael Klein (soccer player, 1965) (* 1965), German soccer player
- Michael Klein (soccer player, 1978) (* 1978), Austrian soccer player
- Michael Klein (racing driver) (* 1988), German racing car driver
- Michael B. Klein (1970–2007), American entrepreneur
- Michael L. Klein (* 1940), British chemist
- Michael Raphael Klein (* 1981), German actor
- Michael U. Klein (* 1952), German economist and university professor
- Milad Klein (* 1987), German actor and acting coach
- Mira Maxa Klein , maiden name of Mira Koffka (1886–1977 / 1978), German translator
- Miriam Klein (* 1937), Swiss jazz singer
- Moritz Klein , German beach volleyball player
N
- Nadine Klein (* 1985), German television actress
- Naomi Klein (* 1970), Canadian writer and journalist
- Niels Klein (* 1978), German jazz musician and composer
- Norbert Johann Klein (1866–1933), German-Bohemian clergyman, Bishop of Brno
O
- Olaf Georg Klein (* 1955), German coach and author
- Oliver Klein (lawyer) (* 1973), German lawyer, tax advisor and university lecturer
- Oliver Klein (judge) (* 1974), German lawyer and judge at the Federal Court of Justice
- Omer Klein (* 1982), Israeli jazz musician
- Oscar Klein (1930–2006), Austrian jazz musician
- Oskar Klein (1894–1977), Swedish physicist
- Oskar Klein-Hattingen (1861–1911), German historian and publicist
- Otto Klein (medic) (1891–1968), Czechoslovak medicin
- Otto Klein (restorer) (1904–1995), German restorer
- Otto Klein (painter) (1906–1994), Swiss painter
- Otto Klein-Kühborth (1896–1976), German entrepreneur
P
- Patrick Klein (* 1994), German ice hockey player
- Paul Klein (1652–1717), as Pablo Clain Jesuit missionary in the Philippines
- Paul Klein (physician) (1919–1998), German microbiologist and immunologist
- Paul Klein (sociologist) (* 1941), German military sociologist and psychologist
- Paul Klein (economist) (* 1968), Canadian economist
- Paul Weber-Klein (before 1930–1992), German engineer
- Paula Edda Klein (* 1995), German-British actress
- Peter Klein (singer) (1907–1992), German-Austrian opera singer (tenor)
- Peter Klein (local history researcher) (1929–2012), German typesetter and local history researcher
- Peter Klein (dendrologist) (* 1945), German wood scientist
- Peter Klein (journalist) (* 1953), Austrian journalist and radio editor
- Peter Klein (athlete) (* 1959), German athlete
- Peter Klein (historian) (* 1962), German historian
- Peter Klein (Author) (* 1969), German author and consultant
- Peter David Klein (* 1940), American philosopher
- Peter K. Klein (* 1942), German art historian
- Philip Klein (Screenwriter) (1889-1935), American screenwriter
- Philip Klein (social scientist) (1890– ??), Hungarian-American social scientist and university professor
- Philip Walter Klein (* 1940), American Hispanist, Romance scholar and university professor
- Philipp Klein (painter) (1871–1907), German painter
- Philipp August Klein (1788–1875), German major general
- Philipp Jakob Klein ( Husaren-Philipp ; 1768–1803), German robber
- Philipp Maria Klein (1892– ??), German athlete, trainer and party official (NSDAP)
- Philippe Klein (* 1957), French engineer and manager
R.
- Ralf Klein (* 1960), German geographer and university professor
- Ralph Klein (basketball trainer ) (1931–2008), German-Israeli basketball player and trainer
- Ralph Klein (politician) (1942–2013), Canadian politician
- Rebekka A. Klein (* 1980), German theologian and university professor
- Regine Klein (1856–1939), German-Austrian singer (soprano)
- Reimar Klein (* 1942), German translator
- Reinalt Johannes Klein (* 1958), German organ builder
- Ricarda Klein (1944–2011), German geriatric nurse
- Richard Klein (folk singer) (1855-1919), German folk singer and ensemble leader
- Richard Klein (politician, 1888) (1888 – after 1932), German politician (DNVP, NSDAP), MdL Prussia
- Richard Klein (artist) (1890–1967), German painter and graphic artist
- Richard Klein (politician, 1913) (* 1913), German teacher and politician (SPD), MdL Saarland
- Richard Klein (historian) (1934–2006), German ancient historian
- Richard Klein , real name of Richard Kline (actor) (* 1944), American actor and television director
- Richard Klein (media manager) (* 1958), British media manager
- Richard Klein , pseudonym of Herbert Knötzl , Austrian cabaret artist, see Project X
- Richard Rudolf Klein (1921–2011), German musician, composer and university lecturer
- Robert Klein (theater manager) (1892–1958), German writer and theater manager
- Robert Klein (philosopher) (1918–1967), philosopher and art historian of Romanian origin
- Robert Klein (entrepreneur) , German entrepreneur
- Robert Klein (actor) (born 1942), American comedian and actor
- Robert Klein-Lörk (around 1906 / 1907–1964), German actor and cabaret artist
- Roelof Klein (1877–1960), Dutch rower
- Roi Klein (1975-2006), Israeli major
- Rolf Klein (lawyer) (1927–2018), German administrative lawyer
- Rolf Klein (politician) (1942–1986), German politician (CDU), Member of the State of North Rhine-Westphalia
- Rolf Klein (musician) ( Rocco Klein ; 1951–2015), German guitarist
- Rolf-Dieter Klein (* 1957), German engineer and programmer
- Roman Iwanowitsch Klein (1858–1924), Russian architect
- Ron Klein (* 1957), American politician
- Rudi Klein (actually Rudolf Klein ; * 1951), Austrian cartoonist
- Rüdiger Klein (* 1958), German neurobiologist
- Rudolf Klein (writer, 1871) (1871–1921), German writer
- Rudolf Klein (District Administrator) (1885–1971), German administrative lawyer and district administrator
- Rudolf Klein (engineer) (1908–1986), German engineer and university professor
- Rudolf Klein (writer, 1920) (1920–2007), Austrian music writer
- Rudolf Klein (political scientist) (* 1930), British journalist, political and social scientist
- Rudolf Klein (soccer coach) (* 1941), Austrian soccer coach
- Rudolf Klein (architect) (* 1955), Hungarian architect
- Rudolf Klein-Diepold (1871–1925), German art historian, art writer and art critic
- Rudolf Klein-Rhoden (1871–1936), Austrian-Bohemian actor
- Rudolf Klein-Rogge (1885–1955), German actor
- Rupert Klein (* 1959), German engineer and university professor
S.
- Saar Klein (* 1967), American film editor
- Salomon Klein (1845–1937), Austrian ophthalmologist
- Samuel Klein (theologian) (1784–1835), Slovak theologian
- Samuel Klein (1886–1940), Israeli historian and geographer
- Sándor Klein (* 1966), Hungarian badminton player
- Sandra Klein (* 1970), German pharmacist and university lecturer
- Sarah Klein (* 1985), Australian long-distance runner
- Sascha Klein (* 1985), German diver
- Sepp Klein (* 1983), German actor
- Siegfried Klein (1882–1944), German rabbi
- Sina Klein (* 1983), German poet and translator
- Sivan Klein (* 1984), Israeli model
- Stefan Klein (journalist) (* 1950), German journalist
- Stefan Klein , birth name of Stefan Kleinkrieg (* 1955), German rock musician
- Stefan Klein (science author) (* 1965), German science author
- Stefan Klein (* 1969), German graphic designer and stamp artist, see Klein and Neumann Communication Design
- Stefan Klein (politician) (* 1970), German politician (SPD)
- Stefan Klein (artist) (* 1983), German visual artist
- Stefan Isidor Klein (1889–1960), translator and journalist
- Stella Klein-Löw (1904–1986), Austrian politician
- Stephanie B. Klein (* 1957), German theologian
- Susanne Klein (1955–2013), German artist
- Susanne Klein-Vogelbach (1909–1996), Swiss gymnastics teacher and physiotherapist
T
- Tanya Hadar Klein (1947–2014), Israeli poet
- Théo Klein (1920–2020), French-Israeli lawyer
- Theo Klein (before 1930–2004), German company founder
- Theodor Klein (1820–1865), German writer and poet, see Georg Theodor Klein
- Theodor Klein (writer, 1845) ( Théodore Klein ; 1845–1935), Luxembourgish writer, typographer and editor
- Theodor Klein-Happe (1894–1970), German publisher and photographer
- Thomas Klein (clarinetist) (1812–1888), German-Austrian clarinetist and clarinet teacher
- Thomas Klein (historian) (1933–2001), German historian and university professor
- Thomas Klein (Germanist) (* 1943), German medievalist and linguist
- Thomas Klein (civil rights activist) (* 1948), German civil rights activist and historian
- Thomas Klein (sociologist) (* 1955), German sociologist
- Thomas Klein (philologist) (* 1957), German philologist
- Thomas Klein (politician) (* 1959), German politician (CDU)
- Thomas Klein (entrepreneur) (* 1963), Austrian entrepreneur
- Thomas Klein (soccer player, 1965) (* 1965), German soccer player
- Thomas Klein (soccer player, 1971) (* 1971), German soccer player
- Thomas Klein (journalist) , German journalist and author
- Thomas M. Klein (* 1962), German television journalist and television producer
- Thoralf Klein (* 1967), German historian
- Tim Klein ( Timotheus Klein; 1870–1944), German writer and journalist
- Torben Klein (* 1976), German singer, composer and bassist
- Torsten-Jörn Klein (* 1964), German manager
U
- Udo Klein (1939–2018), German photographer
- Ulrich von Klein (1822–1893), Prussian major general
- Ulrich Klein (numismatist) (* 1942), German numismatist
- Ulrich Klein (physicist) (* 1951), German physicist and university professor
- Ursula Klein (* 1952), German science historian
- Uta Klein (1958–2019), German sociologist and university professor
- Uwe Klein (General) (* 1954), German Brigadier General
- Uwe Klein (* 1970), German soccer player and coach
V
- Valentin Klein (clergyman) (1572–1637), German pastor and author
- Valentin Klein (Librarian) ( Johann Valentin Klein ), German philosopher and librarian
- Verena Klein (* 1976), German actress
- Viktor Klein (1909–1975), Russian-German university professor, poet and writer
- Volker Klein (* 1949), German soccer player
- Volkmar Klein (* 1960), German politician (CDU)
W.
- Waldemar Klein (1920–2010), German football official
- Walter Klein (local researcher) (1877–1952), German metal artist, university professor and local history researcher
- Walter Klein (writer) (1917–1987), Austro-German diplomat and writer
- Walter Klein (botanist) (1927–2002), German botanist and conservationist
- Walther Klein (1882–1961), Austrian music theorist and composer
- Werner Klein (politician, 1914) (1914–1964), German entrepreneur and politician (FDP)
- Werner Klein (graphic artist) (* 1924), German graphic artist
- Werner Klein (politician, 1928) (1928–1985), German trade unionist and politician (SPD)
- Werner Klein (toxicologist) (1935-2017), German toxicologist
- Werner Klein (physician) (1941–2004), Austrian cardiologist
- Werner Klein (director) , German radio play director
- Werner Klein (physicist) , German physicist and television presenter
- Werner Klein (gallery owner) (* 1964), German art gallery owner
- Werner Ludwig Klein (* 1936), German homeland researcher
- Wilhelm Klein (manufacturer) (1811–1894), German machine manufacturer
- Wilhelm Klein (painter) (1821–1897), German painter
- Wilhelm Klein (politician, 1825) (1825–1887), Swiss politician (liberal)
- Wilhelm Klein (lawyer) (1834–1908), German lawyer and politician, MdL Prussia
- Wilhelm Klein (archaeologist) (1850–1924), Austrian archaeologist and university professor
- Wilhelm Klein (veterinarian) (1885–1955), German animal physiologist
- Wilhelm Klein (dentist) (1887–1948), German dentist and politician (NSDAP)
- Wilhelm Klein (theologian) (1889–1996), German theologian
- Wilhelm Klein (SS member) (1893– ??), German SS Hauptsturmführer
- Wilhelm Klein (politician, 1902) (1902–1983), German politician (NSDAP), MdL Hessen
- Wilhelm Klein (chess player) , German chess player
- Willem Klein (1912–1986), Dutch mental calculator
- Willi Klein (1927–1997), German ski racer
- William Klein (* 1928), American painter, photographer and film director
- Willy Klein (1912–2004), Luxembourg artistic gymnast
- Woldemar Klein (1892–1962), German magazine publisher
- Wolf Peter Klein (* 1961), German specialist in German
- Wolfgang Klein (actor, 1908) (1908–1944), German actor
- Wolfgang Klein (Heimatkundler) (* 1922), German non-medical doctor in Schwörstadt, specialist for East Prussia and the Upper Rhine, holder of the Königsberg Citizens Medal
- Wolfgang Klein (sculptor) (* 1931), German sculptor
- Wolfgang Klein (football official) (1941–2017), German athlete, TV presenter and sports official
- Wolfgang Klein (politician) (* 1943), German politician (SPD)
- Wolfgang Klein (Linguist) (* 1946), German linguist
- Wolfgang Klein (journalist) (* 1946), German journalist
- Wolfgang Klein (actor, 1952) (* 1952), German actor and communication trainer
- Wolfgang Klein (track and field athlete) (* 1953), German track and field athlete, discus thrower
- Wolfgang Klein (Manager) (* 1964), German bank manager
- Wolfhard Klein (* 1949), German journalist and writer
- Wolfram Klein (author) (* 1967), German historian
- Wolfram Klein (soccer player) (* 1968), German soccer player
Y
- Yves Klein (1928–1962), French artist of the Nouveau Réalisme