| Name | Role | Place | Source | |
|---|---|---|---|---|
| Johan Dirk Jacob Postma | Registered | 1922 | Leeuwarden | Population register |
| Johan Dirk Jacob Postma | Registered | 1922 | Leeuwarden | Population register |
| Johan Dirk Jacob Postma | Registered | 1906 | Leeuwarden | Population register |
| Johan Dirk Jacob Postma | Child | 1907 | Leeuwarden | Civil registration births |
| Johan Dirk Jacob Postma | Groom | 1931 | Leeuwarden | Civil registration marriages |
| Johan Dirk Jacob Postma | Registered | 1907 | Leeuwarden | Population register |
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