| Name | Role | Place | Source | |
|---|---|---|---|---|
| Jacob Dirk Helderman | Deceased | 1966 | Harderwijk | Civil registration deaths |
| Jacob Dirk Helderman | Child | 1895 | Stad Vollenhove | Civil registration births |
| Jacob Dirk Helderman | Registered | Stad Vollenhove | Population register | |
| Jacob Dirk Helderman | Registered | Stad Vollenhove | Population register | |
| Jacob Dirk Helderman | Registered | Stad Vollenhove | Population register | |
| Jacob Dirk Helderman | Registered | 1880 | Population register | |
| Jacob Dirk Helderman | Registered | 1880 | Population register | |
| Jacob Dirk Helderman | Registered | 1880 | Population register | |
| Jacob Dirk Helderman | Groom | 1922 | Apeldoorn | Civil registration marriages |
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