Cornelis Koster (1829-1900) |
Margaretha Johanna van Blokland (1833-1907) 
|
Johannus Theodorus Koster (1854-1921)  |
| Nicolaas Bartholomeus Koster (1856- ) |
| Cornelis Koster (1858-1862) |
| Anna Margaretha Koster (1861-1945) |
| Bartholomeus Koster (1867-1918) |
| Christiaan Koster (1870-1947) |
| Cornelis Koster (1864-1927)
|
| Anna Geertruida Hendriks (1865- ) |
| Anna Geertruida Koster (1895- ) |
| Cornelis Koster (1896-1897) |
| Margaretha Johanna Koster (1897- ) |
| Hendrika Cornelia Koster (1900-1903) |
| Albertus Adrianus Koster (1902- ) |
