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Franciscus Adrianus Beckmann (1877- )  |
 | Dirk Bernardus Ketz (1840-1910)
|
Derkje Wentink (1845-1918)
|
| Gerbrand Hendrik Ketz (1866-1875) |
| Christina Willemina Ketz (1868-1869) |
| Dirkje Ketz (1869-1941) |
| Wijntje Ketz (1871-1875) |
 | Johanna Ketz (1874- ) |
| Wijntje Ketz (1876- ) |
| Maria Ketz (1879-1922) |
 | Gerrebrand Hendrik Ketz (1883- ) |
| Adrianus Beckmann (1883- )
|
| Christina Ketz (1886- )
|
