| Name | Role | Place | Source | |
|---|---|---|---|---|
| Hector Karel Lodewijk De Keyzer | Child | 1903 | Brussel | Civil registration births |
| Karel Lodewijk De Keyzer | Father | 1861 | Zele | Civil registration deaths |
| Karel Lodewijk de Keyzer | Deceased | 1984 | Grembergen | Prayer card collection |
| Karel Lodewijk de Keyzer | Deceased | 1984 | Grembergen | Rouwbrieven |
| Lodewijk Hendrik Marie de Keyzer | Registered | 's-Gravenhage, Amsterdam | CABR dossiers | |
| Lodewijk de Keyzer | Registered | 1814 | Ginneken en Bavel | Notarial records |
| Lodewijk de Keyzer | Registered | 1814 | Ginneken en Bavel | Notarial records |
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