| Name | Role | Place | Source | |
|---|---|---|---|---|
| Willemtje Oostingh | Mother of groom | 1911 | Borger | Civil registration marriages |
| Willemtje Oostingh | Mother | 1952 | Groningen | Civil registration deaths |
| Willemtje Oostingh | Child | 1913 | Wildervank | Civil registration births |
| Willemtje Oostingh | Mother | 1875 | Borger | Civil registration births |
| Willemtje Oostingh | Deceased | 1921 | Leeuwarden | Civil registration deaths |
| Willemtje Oostingh | Mother | 1952 | Groningen | Civil registration deaths |
| Willemtje Oostingh | Deceased | 1921 | Leeuwarden, Wildervank | Civil registration deaths |
| Willemtje Oostingh | Registered | 1913 | Leeuwarden | Population register |
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