| OCTAVIA, Antonia | | B. 9 BC | | |
| OCTAVIA, Antonia daughter of Marcus Antonius Creticus II | | B. 80 BC | | |
| OCTAVIA, Numitoria spouse of Marcus Antonius Creticus II | | | | |
| OCTAVIUS, Gaius II | | B. ABT 250 BC | | |
| OCTAVIUS, Gnaeus | | | | |
| OCTAVIUS, Lænus Lucius | | | | D. 38 |
| OCTAVIUS, Octavius spouse of Gaius I | | | | |
| OCTAVIUS, Pontia spouse of Lænus Lucius | | | | |
| OCTAVIUS, Sergius Octavius Laenas Paulinus | | B. 117 | | |
| OCTAVIUS RUFUS, Gnaeus II | | B. 260 BC | | |
| OCTAVIUS THURNINIS, Gaius Rufus IV | | B. 25 JUN 85 BC | | D. 27 JUN 59 BC |
| ODACRE, Unknown Spouse of | | B. 810 | | |
| ODINSSON, Seaxnete | | B. 249 | | D. 327 |
| ODINSSON, Unknown Spouse of Seaxnete | | B. 253 | | |
| OF ACRE,, Joan Countess of Hertford and Gloucester | | B. APR 1272 | | D. 7 APR 1307 |
| OF AESTANGLIE, Sexburge | | | | |
| OF AMBOISE, Leivess | | B. 828 | | D. 854 |
| OF ANGOULEME, Odon | | | | D. ABT 1030 |
| OF ANGOULÊME, Arnauld | | B. 912 | | D. 998 |
| OF ANGOULÊME, William Comte d'Angoulême | | B. ABT 952 | | D. 6 APR 1028 |
| OF ANTWERP, Lionel 1st Duke of Clarence | | B. 29 NOV 1338 | | D. 17 OCT 1368 |
| OF APULIA, Mahalda Guiscard | | B. ABT 1060 | | D. 19 SEP 1107 |
| OF ARAGON, Dolca | | B. ABT 1190 | | |
| OF ARDENNES, Aldaric | | B. 448 | | D. ABT 516 |
| OF ARGOS, Abas | | | | |
| OF ARGOS, Lynceus | | | | |
| OF ARMENIA,, Hydarnes Satrap of Parthia, Hyrcania, Media, Matiene and Sophene | | | | D. AFT 480 BC |
| OF ASGARD,, Bjaed, Bjaf, Baewa Tecti Danish King | | | | |
| OF ATHAMANIE, Cléopatre | | B. 145 BC | | |
| OF AUSTRASIA, Adele | | B. 633 | | D. 24 DEC 734 |