| Name | Role | Place | Source | |
|---|---|---|---|---|
| Jan Forms | Father | 1693 | Amsterdam | Church records baptisms |
| Jan Forms | Father | 1693 | Amsterdam | Church records baptisms |
| Jan Forms | Father | 1686 | Leiden | |
| Jan Severyn Forms | Witness | 1688 | Leiden | |
| Jan Sibrantse Forms | Father | 1695 | Amsterdam | Church records baptisms |
| Jan Sibrantse Forms | Father | 1695 | Amsterdam | Church records baptisms |
| Jan Sibrantsz Forms | Registered | 1686 | Leiden |
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