| Name | Role | Place | Source | |
|---|---|---|---|---|
| Jan Baptiste Fermij | Registered | 1725 | Amsterdam | Church records burials |
| Jan Fermij | Registered | 1758 | Amsterdam | Notarial records |
| Jan Fermij | Registered | 1758 | Amsterdam | Notarial records |
| Jan Fermij | Registered | 1757 | Amsterdam | Notarial records |
| Jan Fermij | Registered | 1757 | Amsterdam | Notarial records |
| Jan Fermij | Registered | 1694 | Middelburg | Member register |
| Jan Fermij | Registered | 1721 | Amsterdam | Church records burials |
| Jan Fermij | Buyer | 1761 | Middelburg | Transport tax |
| Jan Fermij | Registered | Dordrecht | Orphan Chamber Register | |
| Jan Janssen van Fermij | Registered | 1653 | Bergen op Zoom | Notarial records |
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