| Name | Role | Place | Source | |
|---|---|---|---|---|
| Jan Fredrik Jacob Steitz | Father | 1790 | Amsterdam | Church records baptisms |
| Jan Fredrik Steitz | Registered | 1790 | Amsterdam | Notarial records |
| Jan Fredrik Steitz | Registered | 1790 | Amsterdam | Notarial records |
| Jan Fredrik Steitz | Witness | 1806 | Amsterdam | Church records baptisms |
| Jan Steitz | Registered | 1781 | Amsterdam | Notarial records |
| Jan Steitz | Registered | 1782 | Amsterdam | Notarial records |
| Jan Steitz | Registered | 1783 | Amsterdam | Notarial records |
| Jan Steitz | Registered | 1780 | Amsterdam | Notarial records |
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