| Yuri OLSHANSKY (____ - 1536) |
| Barbara Ann OLSON (____ - ____) |
| Evald OLSON (____ - ____) |
| Gladys Ingar OLSON (ABT 1915 - ____) |
| John Eric OLSON (1917 - 2012) |
| May OLSON (____ - ____) |
| Randy OLSON |
| Anne OLSTERHAGEN (1782 - ____) |
| Maria OLTEA (____ - ____) |
| Grace Katherine OLYPHANT |
| Henry OLYPHANT |
| John Kensett OLYPHANT Jr (2 OCT 1895 - 5 OCT 1973) |
| John Vernon Bevan OLYPHANT (1941 - ____) |
| Timothy David OLYPHANT |
| Vivian OLYPHANT |
| Aristotle ONASSIS (____ - ____) |
| Cesarina Doria of ONEGLIA (____ - ____) |
| Deborah Lynn ONEY (____ - ____) |
| Susan ONEY (1780 - 1870) |
| Mary ONLEY (____ - ____) |
| Catherine of OPALIŃSKA (13 OCT 1680 - 19 MAR 1746/47) |
| Fnu OPEL (____ - ____) |
| Charlotte Esther OPPENHEIM (24 FEB 1842 - 13 OCT 1921) |
| Adurm E. OPPENHEIMER (ABT 1900 - ____) |
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