| Name | Role | Place | Source | |
|---|---|---|---|---|
| G J van Hoolwerff | Relation | 1802 | De Rijp | Church records burials |
| Gerard J. van Hoolwerff | Registered | 1837 | Den Helder | Population register |
| Gerard J. van Hoolwerff | Registered | 1837 | Den Helder | Population register |
| Gerard J. van Hoolwerff | Deceased | Amsterdam | Church records burials | |
| Gerrarda J. van Hoolwerff | Registered | Apeldoorn | Population register | |
| Gérard J. van Hoolwerff | Registered | 1882 | Beemster | Population register |
| J. Hoolwerff | Registered | 1764 | Alkmaar | Notarial records |
| J. van Hoolwerff Luijmes | Registered | Norg | Population register |
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