| Name | Role | Place | Source | |
|---|---|---|---|---|
| Gerret Cornelisse Spijkerman | Witness | 1733 | Beverwijk | Notarial records |
| Gerret Cornelisz Spijkerman | Witness | 1745 | Beverwijk | Notarial records |
| Gerret Cornelisz Spijkerman | Guardian | 1754 | Beverwijk | Notarial records |
| Gerret Cornelisz Spijkerman | Attestant | 1733 | Beverwijk | Notarial records |
| Gerret Spijkerman | Father | 1742 | Amsterdam | Church records baptisms |
| Gerret Spijkerman | Andere naam dan overledene | 1761 | Arnhem | Church records burials |
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