| Name | Role | Place | Source | |
|---|---|---|---|---|
| Geert Jacobs Postma | Father | 1875 | Kollumerland c.a. | Civil registration births |
| Geert Jacobs Postma | Relation | 1875 | Kollumerzwaag | Civil registration deaths |
| Geert Jacobs Postma | Father of groom | 1901 | Achtkarspelen | Civil registration marriages |
| Geert Jacobs Postma | Father | 1960 | Achtkarspelen | Civil registration deaths |
| Geert Jacobs Postma | Father | 1969 | Achtkarspelen | Civil registration deaths |
| Geert Jacobs Postma | Registered | 1846 | Kollumerland c.a. | Population register |
| Geert Jacobs Postma | Registered | 1843 | Kollumerland c.a. | Population register |
| Geert Jacobs Postma | Registered | 1843 | Kollumerzwaag | Population register |
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