ca. 1838-1887
| Cornelis Johannes Koker | |
| G: | ca. 1838 |
| Hoorn | |
| O: | 20 mrt 1887 |
| Bloemendaal | |
ca. 1839-1908
| Elisabeth Cornelia Koker | |
| G: | ca. 1839 |
| Hoorn | |
| O: | 11 aug 1908 |
| Utrecht | |
ca. 1837-1903
| Jacobus van Pembroek | |
| G: | ca. 1837 |
| Utrecht | |
| H: | 7 mei 1863 |
| Utrecht | |
| O: | 6 sep 1903 |
| Utrecht | |
ca. 1840-1842
| Maria Anna Koker | |
| G: | ca. 1840 |
| Hoorn | |
| O: | 21 dec 1842 |
| Hoorn | |
1869-1869
| Jan Koker | |
| G: | 13 sep 1869 |
| Utrecht | |
| O: | 3 okt 1869 |
| Utrecht | |
1870-1913
| Gerarda Koker | |
| G: | 28 sep 1870 |
| Utrecht | |
| O: | 28 dec 1913 |
| Maastricht | |
1869-1957
| Cornelis Valkhoff | |
| G: | 23 dec 1869 |
| Breda | |
| H: | 15 sep 1896 |
| Utrecht | |
| O: | 5 jul 1957 |
| Bilthoven | |
1871-1892
| Anna Cornelia Koker | |
| G: | 6 dec 1871 |
| Utrecht | |
| O: | 19 feb 1892 |
| Utrecht | |
1874-1874
| Koker | |
| G: | 19 sep 1874 |
| Utrecht | |
| O: | 19 sep 1874 |
| Utrecht | |
1876-1956
| Alida Elisabeth Koker | |
| G: | 21 jul 1876 |
| Utrecht | |
| O: | 30 apr 1956 |
| Doorn | |
1873-1955
| Dirk Koopman | |
| G: | 16 sep 1873 |
| Amsterdam | |
| H: | 11 jul 1899 |
| Utrecht | |
| O: | 7 dec 1955 |
| Ede | |
1878-1878
| Koker | |
| G: | 9 sep 1878 |
| Utrecht | |
| O: | 9 sep 1878 |
| Utrecht | |
1881-1900
| Rijnhardus Johannes Koker | |
| G: | 25 dec 1881 |
| Utrecht | |
| O: | 17 okt 1900 |
| Davos (Zwi.) | |
1885-1957
| Christiaan Adolf Koker | |
| G: | 8 jul 1885 |
| Utrecht | |
| O: | 27 sep 1957 |
| Utrecht | |
1880-1966
| Bernardine Johanna Albertine Zellekens | |
| G: | 7 aug 1880 |
| Delft | |
| H: | 4 jul 1911 |
| Den Haag | |
| O: | mrt 1966 |
ca. 1843-1906
| Rijnhardus Johannes Koker | |
| G: | ca. 1843 |
| Hoorn | |
| O: | 17 mrt 1906 |
| Utrecht | |
1845-1891
| Jannetje Koker | |
| G: | 8 jan 1845 |
| Broek in Waterland | |
| H: | 20 mei 1868 |
| Utrecht | |
| O: | 4 feb 1891 |
| Utrecht | |
1861-1928
| Elisabeth Geertruida Masman | |
| G: | 21 dec 1861 |
| Amsterdam | |
| H: | 28 nov 1901 |
| Zuilen | |
| O: | 17 mei 1928 |
| Arnhem | |
ca. 1811-1844
| Anna Cornelia Jungius | |
| G: | ca. 1811 |
| Enkhuizen | |
| O: | 10 feb 1844 |
| Hoorn | |
ca. 1804-1869
| Jan Koker | |
| G: | ca. 1804 |
| Broek in Waterland | |
| H: | 3 jul 1836 |
| Enkhuizen | |
| O: | 13 mei 1869 |
| Utrecht | |
-Ja, datum echter onbekend
| Reinhardus Johannes Jungius | |
| O: | Ja, datum echter onbekend |
-Ja, datum echter onbekend
| Elisabeth Cornelia van Rijneveld | |
| O: | Ja, datum echter onbekend |