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Derk Koldewijn (1855- )
|
Hendrika Johanna Rutgers (1852- )
|
Berend Johannes Koldewijn (1879- )  |
| Gerrit Jan Koldewijn (1880- ) |
| Hendrik Koldewijn (1882-1946) |
 | Antonie Koldewijn (1883-1956) |
| Hendrika Johanna Koldewijn (1886- ) |
| Willem Koldewijn (1888- ) |
| Maria Koldewijn (1890- ) |
| Derk Koldewijn (1899- ) |
| Gerritjen Koldewijn (1895- )
|
| Gerhard Bosman (1890- )
|
