Willem Frederik Block (1889-1968) 
|
Maria Stevens (1893-1980) |
| Wilhelmina Frederika Maria Block (1913- ) |
Maria Anna Aletta Block (1914- )  |
| Willem Frederik Block (1925- ) |
| Leendert Cornelis Jacobus Slaager (1914- ) |
| Lucretia Ceclia Block (1917- )
|
