| Name | Role | Place | Source | |
|---|---|---|---|---|
| Wikjen Posthumus | Deceased | 1947 | Smallingerland | Civil registration deaths |
| Wikjen Posthumus | Registered | 1858 | Boornbergum | Population register |
| Wikjen Posthumus | Bride | 1879 | Smallingerland, Boornbergum | Civil registration marriages |
| Wikjen Posthumus | Child | 1858 | Smallingerland | Civil registration births |
| Wikjen Posthumus | Registered | 1858 | Boornbergum | Population register |
| Wikjen Tjeerds Posthumus | Registered | 1858 | Boornbergum | Population register |
| Wikjen Tjeerds Posthumus | Registered | 1858 | Boornbergum | Population register |
| Wikjen Tjeerds Posthumus | Registered | 1858 | Boornbergum | Population register |
| Wikjen Tjeerds Posthumus | Registered | 1858 | Boornbergum | Population register |
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