Gezin: Dr. Wilhelm Hubert Arnold Jan DUKER / Sophia Maria KAT (F221)
getr. 1922Dr. Petrus Gerardus Jan DUKER (1878-1942) 
|
Joanna Maria Elizabeth FACK (1873-1929) |
| Elsa Louise DUKER (1912- ) |
| Dr. Wilhelm Hubert Arnold Jan DUKER (1902- )
|
| Sophia Maria KAT (1897-1990) |
Joanna DUKER (1925-2007)  |
| Johannes Wilhelm DUKER (1928-1928) |