Cornelis Koster (1829-1900) |
Margaretha Johanna van Blokland (1833-1907) 
|
| Nicolaas Bartholomeus Koster (1856- ) |
| Cornelis Koster (1858-1862) |
Anna Margaretha Koster (1861-1945)  |
| Cornelis Koster (1864-1927) |
| Bartholomeus Koster (1867-1918) |
| Christiaan Koster (1870-1947) |
| Johannus Theodorus Koster (1854-1921)
|
| Anna Dernison (1856-1919) |
| Margaretha Anthonia Koster (1876- ) |
| Anthonius Bernardus Koster (1878-1947) |
| Cornelis Hendricus Koster (1880-1945) |
| Johannes Mattheus Koster (1886-1952) |
