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) |
| Cornelis Koster (1864-1927) |
| Christiaan Koster (1870-1947) |
| Bartholomeus Koster (1867-1918)
|
| Neeltje Sundag (1870- ) |
| Anna Albertina Koster (1886-1887) |
| Cornelis Johannes Koster (1888- ) |
| Johannes Koster (1891-1894) |
| Neeltje Koster (1893- ) |
| Anna Albertina Margaretha Koster (1894- ) |
