| Name | Role | Place | Source | |
|---|---|---|---|---|
| Karel Matthijs Posthumus | Father | 1918 | Leeuwarden | Civil registration deaths |
| Karel Matthijs Posthumus | Father of bride | 1846 | Leeuwarden | Civil registration marriages |
| Matthijs Karel Posthumus | Father | 1827 | Leeuwarden | Civil registration deaths |
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