| Name | Role | Place | Source | |
|---|---|---|---|---|
| Gradus Antonius Keizer | Decorated | 's-Gravenhage | Registration honors | |
| Gradus Antonius Keizer | Child | 1908 | Apeldoorn | Civil registration births |
| Gradus Antonius Keizer | Groom | 1939 | Apeldoorn | Civil registration marriages |
| Gradus Johannes Antonius Keizer | Deceased | 1940 | Rhenen | Civil registration deaths |
| Gradus Johannes Antonius Keizer | Deceased | 1940 | Rhenen | Civil registration deaths |
| Gradus Johannes Antonius Keizer | Registered | 's-Gravenhage, Denekamp | Individual Files |
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