Ab An Ba Bl Ca Co D E F G H I J K L Ma Mo N O P Q R Sa Sk T U V W XY Z
| Oda of Bavaria | c 800 | Bavaria | ||||
| Oda of Saxony | c 810 | |||||
| Oda of Saxony | c 900 | |||||
| Oddingseles | Ida | c 1265 | England | |||
| Odin (Woden) | c 215 | Asgard, Asia | ||||
| Odoacre | c 810 | France | ||||
| Olaf, Saint | c 990 | Norway | ||||
| Olaf the Mighty | c 540 | Sweden | ||||
| Olaf Ingjaldsson | The Woodcutter | c 682 | Sweden | |||
| Olaf II Gudrodsson | c 790 | Norway | ||||
| Olaf Skotkonung | King of Sweden | b 950 | Sweden | |||
| Olaf Vermundsson | c 391 | Denmark | ||||
| Olafsdottir | Gyrid | c 905 | Sweden | |||
| Ingrid | b 1001 | Sweden | ||||
| Olafsson | Alf | c 580 | Denmark | |||
| Frodi | c 433 | Denmark | ||||
| Halfdan | c 704 | Norway | ||||
| Haralf | ||||||
| Rognvald | c 800 | Norway | ||||
| Styrbjorn | c 903 | Sweden | ||||
| Oldrich | Duke of Bohemia | c 966 | Bohemia | |||
| Oleg (Igor) | d 945 | Kiev | ||||
| Saint Olga | ||||||
| Onund Ingvarsson | c 636 | Sweden | ||||
| Onundsson | Ingjald | c 660 | Sweden | |||
| Ordgar | d 971 | England | ||||
| Ordono I | ||||||
| Ordoño II | King of Leon | Spain | ||||
| Ordono III | King of Leon | c 926 | Spain | |||
| Oreguen | c 800 | |||||
| Orreby de | Alice | England | ||||
| Fulke | England | |||||
| Orseolo of | Ottone | c 970 | Hungary | |||
| Frowila | c 990 | Italy | ||||
| Osborn | Nest Verch | c 1079 | ||||
| Osburga | c 810 | |||||
| Oslac | Chief Butler | c 785 | ||||
| Ottar Egilsson | c 551 | Sweden | ||||
| Ottarson | Adils | c 572 | ||||
| Otto I HRE | K of Italy, Germany | b 912 | Saxony | |||
| Otto I of Saxony | c 850 | |||||
| Otto I of Tullfeld | c 982 | |||||
| Otto I of Maurienne | aka de Savoy | c 1021 | France | |||
| Otto II HRE | c 1010 | |||||
| Otto II of Carinthia | b 947 | |||||
| Otto II of Chiny | d 1125 | |||||
| Otto II of Tullfeld | c 1008 | |||||
| Otto of Lorraine | c 955 | |||||
| Ottone Orseolo | c 970 | Hungary | ||||
| Owain | Iorwerth | c 1150 | ||||
| Maredudd | c 938 | England | ||||
| Tangwystl | c 794 | Wales | ||||
| Owain Hywel | c 913 | Wales | ||||
| Owain Maredydd | King of Dyfed | c 800 | Britain | |||