Jacob Frederiks (1870-1953) 
|
Maria den Boer (1875-1940) |
| Jacobus Johannes Frederiks (1896-1907) |
Hendrika Elizabeth Frederiks (1899- )  |
| Jan Frederiks (1901- ) |
| Jacoba Maria Frederiks (1906- ) |
| Alida Petronella Frederiks (1908-1909) |
| Jacob Frederiks (1912- ) |
| Alida Petronella Frederiks (1910- )
|
