| Name | Role | Event | DateYear | Place | Source |
|---|---|---|---|---|---|
| Gerhardus (Gradus) Boelaars | Registered | Registration | 1880 | Nijmegen | Population register |
| Gradus Boelaars | Registered | Militia register registration | Zeeland | Militia records | |
| Gradus Boelaars | Registered | Militia register registration | Zeeland | Militia records | |
| Gradus Boelaars | Registered | Registration | 17-3-1843 | Zeeland | Population register |
| Gradus Boelaars | Registered | Registration | 's-Gravenhage | Studbooks | |
| Gradus Boelaars | Registered | Registration | Zeeland | Population register | |
| Gradus Boelaars | Child | Birth | 17-3-1843 | Zeeland | Civil registration births |
| Gradus Boelaars | Registered | Militia register registration | Zeeland | Militia records |
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