| Name | Role | Place | Source | |
|---|---|---|---|---|
| Gerret Helderman | Father | 1747 | Amsterdam | Church records baptisms |
| Gerret Helderman | Father | 1747 | Amsterdam | Church records baptisms |
| Gerret Helderman | Father | 1747 | Amsterdam | Church records baptisms |
| Gerret Helderman | Father | 1747 | Amsterdam | Church records baptisms |
| Gerret Jansz Helderman | Father | 1687 | Amsterdam | Church records baptisms |
| Gerret Jansz Helderman | Father | 1687 | Amsterdam | Church records baptisms |
| Gerret Klaas Helderman | Registered | 1853 | Amsterdam | Patient registry |
| Gerret Klaas Helderman | Father | 1810 | Amsterdam | Church records baptisms |
| Gerret Klaase Helderman | Father | 1806 | Amsterdam | Church records baptisms |
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