| Name | Role | Place | Source | |
|---|---|---|---|---|
| Jan Baptist De Keyzer | Father | 1870 | Elversele | Civil registration deaths |
| Jan Baptist De Keyzer | Witness | 1894 | Huldenberg | Civil registration marriages |
| Jan Baptist De Keyzer | Father | 1878 | Leupegem | Civil registration births |
| Jan Baptist De Keyzer | Father | 1836 | Reet | Civil registration deaths |
| Jan Baptist De Keyzer | Witness | 1872 | Jette | Civil registration marriages |
| Jan Baptist de Keyzer | Deceased | 1997 | Erps-Kwerps | Prayer card collection |
| Jan Baptist de Keyzer | Father | 1945 | Aarschot | Civil registration deaths |
| Leo Maria Jan Baptist Monica De Keyzer | Child | 1884 | Mechelen | Civil registration births |
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