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