| Name | Role | Place | Source | |
|---|---|---|---|---|
| Polydore De Keyzer | Witness | 1901 | Schaarbeek | Civil registration marriages |
| Polydore De Keyzer | Witness | 1910 | Sint-Gillis | Civil registration marriages |
| Polydore Ivo De Keyzer | Child | 1884 | Petegem-aan-de-Schelde | Civil registration births |
| Polydore Yvon De Keyzer | Groom | 1910 | Elsene | Civil registration marriages |
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