| Name | Role | Place | Source | |
|---|---|---|---|---|
| Robbert Krijnen van Tregt | Groom | 1693 | Leiden, Alphen | |
| Robbert van Tregt | Employee | 1734 | Amsterdam | Personnel-administration |
| Robbert van Tregt | Employee | 1721 | Amsterdam | Personnel-administration |
| Robbert van Tregt | Registered | 1742 | Amsterdam | Notarial records |
| Robbert van Tregt | Father | 1697 | Leiden |
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