| Father | Christiaan Lodewijk Quellhorst (1853 - 1927) |
| Mother | Maartje Groenleer (1852 - 1901) |
| Sibling | Hilla Maria Quellhorst (1878 - 1910) |
| Sibling | Christiaan Loderwijk Quellhorst (1888 - 1890) |
| Sibling | Sophia Christina Quellhorst (1881 - 1881) |
| Sibling | Jan Quellhorst (1883 - 1884) |
| Sibling | Sophia Christina Quellhorst (1885 - 1885) |
| Sibling | Barbera Quellhorst (1889 - 1890) |
| Sibling | Barbera Quellhorst (1879 - 1880) |
| Sibling | Carl Wilhelm Quellhorst (1887 - ) |
| Sibling | Maarje Quellhorst (1890 - 1890) |
| Sibling | Sophia Christine Quellhorst (1894 - ) |
| Sibling | Jan Quellhorst (1886 - 1940) |
| Sibling | Gerrit Christiaan Quellhorst (1883 - 1884) |
| Sibling | Christiaan Loderwijk Quellhorst (1891 - 1985) |
| Sibling | Georg Heinrich Quellhorst (1893 - 1893) |