| Name | Role | Place | Source | |
|---|---|---|---|---|
| Jacob Matthys Simons | Witness | 1806 | Arnhem | Church records baptisms |
| Jacob Matthys Simons, neef | Heir apparent | 1786 | Notarial records | |
| Matthys Simons | Registered | 1733 | Amsterdam | Notarial records |
| Matthys Simons | Witness | 1793 | Tiel | Church records baptisms |
| Matthys Simons | Deceased | 1857 | Leiden, Leyden |
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