Gezin: Jan Derwa / Margaretha Castermans (F1602946205)
 | Servatius Nicolas Derwa (1871- ) |
| Jan Derwa (1902-1979) 
|
 | Margaretha Castermans (1902-1981) |
| Alice Derwa (1929-2018)  |
| Servatius Nicolas Derwa (1871- ) |
| Jan Derwa (1902-1979)
|
| Margaretha Castermans (1902-1981) |
| Alice Derwa (1929-2018) |