List of German noble families / O

O

Surname	Period	Remarks	coat of arms
Oberg	since 1189	Hildesheim and Altmark primeval nobility; Expired in 1861 in the male line of the Count; Side lines continue to bloom to this day
Oberhaim	since 1235	Upper Austrian-Bavarian noble family with headquarters in Oberham near Hohenzell
Oberländer	?	Vogtland, Upper Lusatian and Bavarian noble families
Obernitz	since 1258	Vogtland nobility; 1695 imperial baron status
Oberstein	1075-1683	Southwest German nobility
Obodrites	up to modern times	Dynasty of the dukes of Mecklenburg
Ox from Gunzendorf	1289-1583	Franconian noble family
O'Donell from Tyrconell	?	old, originally Irish, then Spanish, French and Austrian noble families; 1763 Austrian recognition as counts
Oechlitz	1286 to around 1571	old knightly Thuringian-Saxon noble family
opener	since 1209	Franconian noble family
Schöllenbach oil port	since 1363	Patrician family of the Free Imperial City of Nuremberg
Oils	since 1259	Prussian-Baltic noble family
Oer	since 1204	Westphalian nobility; 1677 imperial baron status
Oertzen	since 1192/1260	Mecklenburg primeval nobility; 1733 Danish count, 1792 imperial count
Oettingen	since 1147	noble Franconian and Swabian counts
Oettingen (1687)	Late 15th century	gender originally from Westphalia; It was ennobled in 1687
Oeynhausen	since 1237	Westphalian nobility; baronial line: 1874 Prussian recognition of the baron class; Counts line: 1721 Imperial Counts
Open	since 17th century	Lower Saxon noble family	_{Tribe Schöllisch} _{Tribe Entrup}
Offenberg	since 10th century	Swiss-Baltic noble family
Ofteringen	since 1240	South German noble family in the county of Stühlingen
Ohlen and Adlerskron	since 1548	Silesian noble family
Olberg	since 1829	Prussian noble family
Oldenburg	since 1091	North German princely family
Oldenburg	since 1247	Original aristocracy from Bremen, 1262 in Mecklenburg, 1576 in Livonia, 1694 in the Pomeranian-Neumark border area, 1730 in Western Pomerania, in the 18th century in East Prussia, 1797 enrolled in the Livonian Knighthood (No. 276)
Oldershausen	since 1197	Lower Saxon nobility
Ompteda	since the 14th century	Aristocratic family from Frisia and Lower Saxony from the Netherlands
(Oppell) Oppeln-Bronikowski	since 1261	Lausitzian nobility
Oppen	since 1221	Upper Saxon-Brandenburg noble family with two branch lines
Oppenfeld	since 1859	Prussian noble family
Oppenheim	since approx. 17th century	Bankers of Jewish origin from Oppenheim in Rheinhessen; 1867 Austrian nobility, 1868 Prussian baron
Oppersdorff	since 1321	Silesian nobility, since 1969 one line has been called Counts von Oppersdorff Solms-Braunfels; In 1554 hereditary-Austrian baron status, in 1601 Bohemian recognition, in 1626 and 1635 imperial count status, in 1651 and 1652 Bohemian confirmation, the title of count of the Bohemian line, which had been in use since 1700, was recognized by imperial decree in 1746
Orange Nassau	since the early Middle Ages	ruling royal house of the Netherlands of Franco-German origin.
Orgies-Rutenberg	since 1296	Baltic noble family
Oriola	since 1355	Prussian noble family of Portuguese descent
Orlov	since approx. 17th century	sex originating from Russia; 1762 Russian count, 1763 Roman-German imperial prince; Matriculation with the Livonian knighthood in 1765, with the Estonian knighthood in 1766; a line legitimized in 1796 with Russian nobility, 1825 Russian count, 1840 enrollment in the Courland knighthood, 1856 Russian prince, Russian recognition of the prince's title in 1872
Oron	1215 to 14th century	extinct noble family from Vaud	-
O'Rourke	since 5th century	from Ireland, later a. a. aristocratic family resident in Russia and Estonia
Orsini and Rosenberg (Orsini-Rosenberg)	since 1322	Austrian nobility from south-eastern Styria; descending from the Meinhardiner and of the same tribe as the Lords of Graben ; 1633 imperial baron status; 1681 hereditary imperial count; 1790 imperial princes (primogeniture); first called themselves Rosenberg, from 1683 Ursini-Rosenberg,
Ortenburg (Bavaria)	since 1134	Dynasty with origins from Rhine Franconia and Carinthia
Ortenburg (Carinthia)	1096-1418	Immediate imperial counts in Carinthia
Orth	since the 2nd half of the 15th century	Patrician family of the imperial cities Heilbronn and Frankfurt
Ortlieb	1260-1478	one of the oldest patrician families in the imperial city of Nuremberg
Ostau	since 1380	Prussian nobility
Ostein	1135-1809	Extinct Upper Rhine-Alsatian nobility, 1712 imperial count, since 1766 imperial in the Westphalian imperial count college
from the east	since 1219	Lower Saxon nobility; House Plathe: 1888 Prussian counts; House Jannewitz: 1897 Prussian counts; Württemberg house: 1855 Württemberg baron class
Osterberg	?	Bohemian noble family, which was knighted in 1674 and in 1739 by Emperor Charles VI. was raised to the baron rank
Osterhausen	since 1200	Thuringian nobility
Osteschau	since 1369	Moravian noble family originating from Prussia
Ostman von der Leye	since 1549	Westphalian gender; 1705 imperial knights and hereditary-Austrian nobility; 1884 Prussian recognition of the baron class
Ostroróg	1383-1975	extinct Wielkopolska nobility family; 1782 legitimation as count
Otakare	10th to 12th century	Early and high medieval counts that were mainly based in Chiemgau, Traungau and Karantanien or in Styria	-
Othegraven	since 1375	Limburg nobility
Otten	since 13th century	Westphalian noble family
Otting	1245-1578	extinct South German local noble family
Ouren	1095-1365	Eager noble family at Castle Ouren in what is now East Belgium	-
Ovelacker	1266-1689	extinct Westphalian knight family
Ow	since 1095	Swabian noble family; 1681 Imperial Baroness
Owstin	since 1327	Vorpommerscher Uradel