| Name | Role | Place | Source | |
|---|---|---|---|---|
| Jan Groenberg | Registered | 1753 | Amsterdam | Notarial records |
| Jan Groenberg | Registered | 1768 | Amsterdam | Notarial records |
| Jan Groenberg | Registered | 1770 | Amsterdam | Notarial records |
| Jan Groenberg | Registered | 1777 | Amsterdam | Notarial records |
| Jan Groenberg | Father | 1811 | Steenbergen | Civil registration deaths |
| Jan Groenberg | Deceased | 1811 | Steenbergen | Civil registration deaths |
| Jan Groenberg | Registered | 1810 | Oostende | Population register |
| Jan Poulus Groenberg | Witness | 1748 | Amsterdam | Church records baptisms |
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