| Name | Role | Place | Source | |
|---|---|---|---|---|
| Dirk Jan Posthuma | Registered | Hoorn | Population register | |
| Dirk Jan Posthuma | Registered | 1907 | Hensbroek | Population register |
| Dirk Jan Posthuma | Groom | 1928 | Zwolle | Civil registration marriages |
| Dirk Jan Posthuma | Registered | 1880 | Population register | |
| Dirk Jan Posthuma | Child | 1907 | Hensbroek | Civil registration births |
| Dirk Jan Posthuma | Inschrijfregisters - rolboeken persoon | Assen | Inschrijfregisters - Rolboeken | |
| Dirk Jan Posthuma | Registered | 's-Gravenhage, Hensbroek, Zwolle | CABR dossiers |
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