| Name | Role | Place | Source | |
|---|---|---|---|---|
| Constant Knaepen | Witness | 1912 | Heverlee | Civil registration births |
| Constant Knaepen | Witness | 1906 | Heverlee | Civil registration marriages |
| Constant Knaepen | Witness | 1900 | Heverlee | Civil registration marriages |
| Constant Knaepen | Witness | 1903 | Heverlee | Civil registration births |
| Constant Knaepen | Witness | 1919 | Heverlee | Civil registration births |
| Constant Knaepen | Witness | 1905 | Heverlee | Civil registration births |
| Constant Knaepen | Witness | 1924 | Heverlee | Civil registration marriages |
| Gustave Constant Knaepen | Child | 1889 | Heverlee | Civil registration births |
| Gustave Constant Knaepen | Groom | 1924 | Heverlee | Civil registration marriages |
| Joseph Auguste Constant Knaepen | Registered | 1914 | Amsterdam | Population register |
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