| Name | Role | Place | Source | |
|---|---|---|---|---|
| Jacobus Greft | Registered | 1721 | Amsterdam | Notarial records |
| Jacobus Greft | Registered | 1754 | Amsterdam | Notarial records |
| Jacobus Greft | Registered | 1725 | Amsterdam | Church records burials |
| Jacobus Jan Frederik van der Greft | Registered | 1913 | Hilversum | Militia records |
| Jacobus Jan Frederik van der Greft | Conscript | 1913 | Hilversum | Militia records |
| Jacobus Jan Frederik van der Greft | Groom | 1918 | Hilversum | Civil registration marriages |
| Jacobus van der Greft | Relation | 1828 | Zevenhoven | |
| Maarten Jacobus Greft | Child | 1876 | Alkemade |
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