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| Surname | Firstname | Dates | Lots |
|---|---|---|---|
| O’Connel | Frédérique Emilie Auguste | 1823-1885 | 1 |
| Obbes | Joan Francois | 1869-1963 | 1 |
| Oberman | Anthony | 1781-1845 | 3 |
| Oberstadt-Kranenburg | Anna Clara | 1876-1950 | 3 |
| Ocker | Dirk | 1882-1958 | 3 |
| Odevaere | Joseph Denis | 1778-1830 | 1 |
| Oeder | Frans David | 1867-1944 | 15 |
| Oehmichen | Hugo | 1843-1933 | 2 |
| Oepts | Wim | 1904-1988 | 2 |
| Oesterley | Maria | 1842-xxxx | 1 |
| Offermans | Anthony Jacobus | 1792-1872 | 1 |
| Offermans | Tony | 1854-1911 | 8 |
| Oger | Albert Louis | 1886-1947 | 1 |
| Ohl | Frits Lucien | 1904-1982 | 7 |
| Olafson | B. | xxxx-xxxx | 1 |
| Oldeboerrigter | Melle | 1908-1976 | 1 |
| Oldewelt | Ferdinand | 1857-1935 | 1 |
| Oliva | F.O | 19xx-19xx | 1 |
| Oliver | William | 1805-1853 | 1 |
| Olterdissen | F. | 1865-1923 | 1 |
| Ommeganck | Balthasar Paul | 1755-1826 | 9 |
| Onderberg | P.J. | 1821-1890 | 1 |
| O'Neill | George Bernard | 1828-1917 | 1 |
| O'Neill | Henry Nelson | 1817-1880 | 1 |
| Ongania | Umberto | 18xx-19xx | 1 |
| Onken | Carl | 1846-1934 | 1 |
| Ooijen | J.A.W. van | 1885-1954 | 1 |
| Ooms | Karel | 1845-1900 | 1 |
| Oorschot van | Theodorus 'Dorus' | 1910-1989 | 5 |
| Oort van | Hendrik | 1775-1847 | 2 |
| Oostendorp | Jan Harm | 1896-1979 | 4 |
| Oostenga | Thomas Teekes | 1812-1865 | 1 |
| Oosterhoudt van | Dirck | 1756-1830 | 1 |
| Oosterloo | Wouter Dirk | 1879-1955 | 2 |
| Oosterzee van | Hermannus A. | 1863-1933 | 1 |
| Opdenhoff | George Willem | 1807-1873 | 32 |
| Oppenoorth | 'Willem' Johannes | 1847-1905 | 12 |
| Oranje, Princess van | Wilhelmina Helena Paulina Maria, | 1880-1962 | 1 |
| Orleans d' | Clementine | 1817-1907 | 1 |
| Orlik | Emil | 1870-1932 | 1 |
| Ortiz de Zarate | Manuel | 1886-1946 | 1 |
| Ortmans | François August | 1827-1884 | 1 |
| Os van | Georgius Jacobus Johannes | 1782-1861 | 16 |
| Os van | Jacobus Petrus Cornelis | 1869-1944 | 1 |
| Os van | Jan | xxxx-xxxx | 2 |
| Os van | Pieter Frederik | 1808-1892 | 4 |
| Os van | Pieter Gerardus | 1776-1839 | 17 |
| Os van | ??? | xxxx-xxxx | 1 |
| Os-Delhez van | Hendrik | 1880-1976 | 10 |
| Osnaghi | Josefine | 1870-1920 | 1 |
| Osseaud | Johannes | 1880-1935 | 1 |
| Osterlind | Anders | 1887-1960 | 1 |
| Ottenheim | H. | xxxx-xxxx | 1 |
| Otterbeek | Jacobus Hermanus | 18xx-1902 | 1 |
| Ouburg | Piet | 1893-1956 | 2 |
| Oudes | Jacob (Sr) | 1858-1921 | 1 |
| Oudshoorn | Albert Jan | 1877-1933 | 1 |
| Ouwater | Isaak | 1748-1793 | 1 |
| Overbeek van | Gijsbertus Johannes | 1882-1947 | 8 |
| Oyens | David | 1865-1902 | 13 |
| Oyens | Pieter | 1842-1894 | 9 |