| Name | Role | Place | Source | |
|---|---|---|---|---|
| Jacobus Focanus | Registered | 1729 | Amsterdam | Notarial records |
| Jacobus Focanus | Registered | 1692 | Tilburg | Notarial records |
| Jacobus Focanus | Registered | 1692 | Tilburg | Notarial records |
| Jacobus Focanus | Father | 1622 | Dordrecht | Church records baptisms |
| Jacobus Focanus | Father | 1618 | Dordrecht | Church records baptisms |
| Jacobus Focanus | Father | 1624 | Dordrecht | Church records baptisms |
| Jacobus Focanus | Personen | 1645 | Notarial records | |
| Jacobus Focanus | Deceased | 1645 | Utrecht | Church records burials |
| Jacobus Johansz. Focanus | Registered | 1615 | Dordrecht | Church records marriages |
| Jacobus Johansz. Focanus | Registered | 1615 | Dordrecht | Church records marriages |
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