1865 - 
| Anna Geertruida Koster 1895- |
| Anna Geertruida Koster | |
| G: | 7 jan 1895 |
| Haarlem | |
Martinus Hirs 1893- |
| Martinus Hirs | |
| G: | 1893 |
| Haarlem | |
| H: | 24 okt 1917 |
| Amsterdam | |
| Cornelis Koster 1896-1897 |
| Cornelis Koster | |
| G: | 6 jun 1896 |
| Haarlem | |
| O: | 23 jan 1897 |
| Haarlem | |
| Margaretha Johanna Koster | |
| G: | 23 jun 1897 |
| Haarlem | |
| Cornelis Postma 1895- |
| Cornelis Postma | |
| G: | 1895 |
| Leeuwarden | |
| H: | 8 okt 1919 |
| Amsterdam | |
| Johannes Frederik Goppel 1896- |
| Johannes Frederik Goppel | |
| G: | 1896 |
| Rotterdam | |
| H: | 8 mei 1935 |
| Rotterdam | |
| Hendrika Cornelia Koster 1900-1903 |
| Hendrika Cornelia Koster | |
| G: | 24 dec 1900 |
| Haarlem | |
| O: | 24 nov 1903 |
| Haarlem | |
| Albertus Adrianus Koster 1902- |
| Albertus Adrianus Koster | |
| G: | 20 mei 1902 |
| Haarlem | |
| Maria Goppel 1903- |
| Maria Goppel | |
| G: | 1903 |
| Rotterdam | |
| H: | 27 jan 1926 |
| Rotterdam | |
| Anna Geertruida Hendriks 1865- |
| Anna Geertruida Hendriks | |
| G: | 1865 |
| Haarlem | |
| Cornelis Koster 1864-1927 |
| Cornelis Koster | |
| G: | 1 aug 1864 |
| Haarlem | |
| H: | 18 okt 1893 |
| Haarlem | |
| O: | 30 okt 1927 |
| Haarlem | |
