| Ulrik OLDENBURG (Bishop fo Schleswig) (30 DEC 1578 - 27 MAR 1624) |
| Ulrik OLDENBURG (Prince-Bishop of Schwerin) (2 FEB 1610/11 - 12 AUG 1670) |
| Ulrika Eleonora of OLDENBURG (11 SEP 1656 - 26 JUL 1693) |
| Valdemar Christian OLDENBURG (26 JUN 1622 - 26 FEB 1655/56) |
| Vilhelm OLDENBURG (21 FEB 1686/87 - 23 NOV 1705) |
| Vilhelmine Marie of OLDENBURG (18 JAN 1808 - 30 MAY 1891) |
| Wilhelmina Caroline of OLDENBURG (10 JUL 1747 - 14 JAN 1820) |
| Wilhelmina Ernestina of OLDENBURG (21 JUN 1650 - 22 APR 1706) |
| Nancy OLDHAM (____ - ____) |
| Evdochia of OLELKOVICH (____ - 25 NOV 1467) |
| Martha OLESDATTER (____ - ____) |
| Svyatoslav III Igorevich OLGOVICHI (1176 - SEP 1211) |
| Julie Lynch OLIN (21 OCT 1882 - 11 MAR 1961) |
| Pearis OLINGER (____ - BEF 11 NOV 1864) |
| David Sewall OLIPHANT (18 JAN 1816 - 13 NOV 1903) |
| Jenny OLIPHANT (1848 - ____) |
| Lucy OLIPHANT (1840 - ____) |
| Mary E. OLIPHANT (1838 - ____) |
| Pablo Roman OLIVARES (30 JUN 1941 - 10 APR 2009) |
| Paul Anthony OLIVARES |
| Salvador OLIVARES (____ - ____) |
| Veronica OLIVARES |
| Alfred T. OLIVE (____ - 12 OCT 1941) |
| Collet OLIVER (1572 - 15 SEP 1692) |
| Elizabeth OLIVER (____ - ____) |
| Foster Findley OLIVER (26 OCT 1916 - 28 JUN 1995) |
| Harriet OLIVER (1860 - ____) |
| Isaac OLIVER Jr. (____ - ____) |
UP (Olan Harvey NORMAN - Amalia of ORANGE-NASSAU )
BACK (Louise Auguste of OLDENBURG - Sophie of OLDENBURG )
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