Knostanty OSTROGSKI (ABT 1460 - 1530)
Joseph OSWALD (____ - ____)
Richard OSWALD (____ - ____)
Susannah OSWALD (____ - ____)
Leopold OTAKAR (____ - 1129)
Ottokar I OTAKAR (Margrave of Styria) (____ - 29 MAR 1075)
Ottokar II OTAKAR (Margrave of Styria) (____ - 28 NOV 1122)
Ottokar III OTAKAR (Margrave of Styria) (1124 - 31 DEC 1164)
Ottokar IV OTAKAR (Duke of Styria) (19 AUG 1163 - 9 MAY 1192)
Thomas FITZ OTES (1231 - 28 MAR 1274)
Mildred Leftwich OTEY (23 APR 1804 - ABT 1843)
OTHELHILDE (____ - ____)
Katharina Christiane Maria OTTO (____ - ____)
Louis-Guillaume OTTO (7 AUG 1754 - 9 NOV 1817)
Şehzade Halil of OTTOMAN (ABT 1346 - ABT 1362)
Bayezid Han bin Murad Han OTTOMAN (4th Ottoman Sultan) (ABT 1360 - 8 MAR 1402/03)
Meḥemmed bin Bāyezīd Ḫān OTTOMAN (5th Ottoman Sultan) (1389 - 26 MAY 1421)
Murad bin Mehemmed Han OTTOMAN (Ottoman Sultan) (16 JUN 1404 - 3 FEB 1450/51)
Murad bin Orhan OTTOMAN (3rd Ottoman Sultan) (29 JUN 1326 - 15 JUN 1389)
Musa Çelebi Osman OTTOMAN (2nd Ottoman-Emir of Rumelia) (1388 - 5 JUL 1413)
Orhan I bin Osman OTTOMAN (2nd Ottoman Sultan) (1281 - MAR 1361/62)
Osman Gazi OTTOMAN (1st Ottoman Sultan) (____ - BET 1323 AND 1324)
Brun of OTTONIAN (____ - ____)
Bruno OTTONIAN (Archbishop of Cologne) (____ - ____)
Bruno OTTONIAN (Duke of Saxony) (BET 830 AND 840 - 2 FEB 879/80)

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