| Name | Role | Place | Source | |
|---|---|---|---|---|
| Hermann Posthuma | Groom | 1937 | Weststellingwerf | Civil registration marriages |
| Hermann Posthuma | Registered | 1912 | Kleeburg | Population register |
| Hermann Posthuma | Registered | 's-Gravenhage, Weidesheim, Huizum | CABR dossiers | |
| Hermann Posthuma | Father | 1946 | Leeuwarden | Civil registration deaths |
| Hermann Posthuma | Registered | 1912 | Cüchenheim Rheinland Duitschland | Population register |
| Hermann Posthuma | Registered | 1912 | Cüchenheim Rheinland Duitschland | Population register |
| Hermann Posthuma | Registered | 1912 | Cûchenheim | Population register |
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