| Johan Willem Leeflang |
| Johan Willem Leeflang | |
| G: | 28 feb 1849 |
| Stad Almelo | |
| O: | 13 feb 1891 |
| Utrecht | |
| Willem Leeflang |
| Willem Leeflang | |
| G: | 2 okt 1850 |
| Haarlem | |
| O: | 3 apr 1870 |
| Utrecht | |
| François Leeflang |
| François Leeflang | |
| G: | 11 mei 1853 |
| Haarlem | |
| O: | 6 dec 1920 |
| Utrecht | |
| Elisabeth ten Dam |
| Elisabeth ten Dam | |
| G: | 8 dec 1864 |
| Stad Almelo | |
| H: | 29 sep 1892 |
| Stad Almelo | |
| O: | 20 apr 1943 |
| Utrecht | |
| Cornelis Leeflang |
| Cornelis Leeflang | |
| G: | 28 aug 1854 |
| Haarlem | |
| O: | Ja, datum echter onbekend |
| Maria Cornelia Leeflang |
| Maria Cornelia Leeflang | |
| G: | 20 sep 1855 |
| Haarlem | |
| O: | 26 apr 1856 |
| Haarlem | |
| Christiaan Leeflang |
| Christiaan Leeflang | |
| G: | 21 dec 1856 |
| Haarlem | |
| O: | 21 jan 1922 |
| Utrecht | |
| Margaretha van der Heide |
| Margaretha van der Heide | |
| G: | 15 mei 1861 |
| Leeuwarden | |
| H: | 15 sep 1893 |
| Utrecht | |
| O: | 16 feb 1940 |
| Utrecht | |
| Hendricus Arnoldus Leeflang |
| Hendricus Arnoldus Leeflang | |
| G: | 8 jan 1858 |
| Haarlem | |
| O: | Ja, datum echter onbekend |
| Karel Jacob Leeflang |
| Karel Jacob Leeflang | |
| G: | 11 feb 1859 |
| Haarlem | |
| O: | 1 apr 1916 |
| Utrecht | |
| Karsina Waterberg |
| Karsina Waterberg | |
| G: | 18 sep 1859 |
| Groningen | |
| H: | 7 dec 1899 |
| Utrecht | |
| O: | 21 jan 1930 |
| Rhenen | |
| Johan Cato Koumans |
| Johan Cato Koumans | |
| G: | 12 apr 1889 |
| Magalang (Ned. Ind.) | |
| O: | na 1957 |
| Johanna Maria Bovelander |
| Johanna Maria Bovelander | |
| G: | 25 sep 1886 |
| Den Haag | |
| O: | 2 mei 1957 |
| Delft | |
| Robert Herman Cato Koumans |
| Robert Herman Cato Koumans | |
| G: | 11 mei 1892 |
| Oengaran (Semarang, Ned. Ind.) | |
| O: | 14 mrt 1942 |
| Sachsenhausen (D) | |
| Johanna Ida Stortenbeker |
| Johanna Ida Stortenbeker | |
| G: | 6 mei 1895 |
| Buitenzorg (Ned. Ind.) | |
| H: | 18 aug 1924 |
| Rijswijk | |
| O: | 28 jan 1983 |
| Leidschendam | |
| Otto Karel Cato Koumans |
| Otto Karel Cato Koumans | |
| G: | 18 jul 1896 |
| Palimanan (Ned. Ind.) | |
| O: | Ja, datum echter onbekend |
| Catharina Jacoba Leeflang |
| Catharina Jacoba Leeflang | |
| G: | 4 mrt 1860 |
| Haarlem | |
| O: | sep 1896 |
| Cheribon (Ned. Ind.) | |
| Johannes Jacobus Koumans |
| Johannes Jacobus Koumans | |
| G: | 19 aug 1859 |
| Delft | |
| H: | 14 jun 1888 |
| Utrecht | |
| O: | 7 feb 1951 |
| Lochem | |
| Aart Willem Leeflang |
| Aart Willem Leeflang | |
| G: | 1 mrt 1815 |
| Gouda | |
| O: | 8 jan 1861 |
| Utrecht | |
| Maria Cornelia Graf |
| Maria Cornelia Graf | |
| G: | 28 jun 1821 |
| Den Bosch | |
| H: | 17 mei 1848 |
| Den Haag | |
| O: | 9 sep 1903 |
| Utrecht | |
|
| Jan Leeflang |
| Jan Leeflang | |
| G: | ca. 1784 |
| O: | 22 jan 1830 |
| Gouda | |
| Aagje Koorevaar |
| Aagje Koorevaar | |
| G: | ca. 1785 |
| O: | 21 sep 1844 |
| Gouda | |