| Name | Role | Place | Source | |
|---|---|---|---|---|
| Constant Decroon | Father | 1869 | Zaventem | Civil registration births |
| Constant Decroon | Father of bride | 1904 | Sint-Joost-ten-Node | Civil registration marriages |
| Constant Decroon | Father | 1873 | Zaventem | Civil registration births |
| Constant Decroon | Witness | 1888 | Sint-Stevens-Woluwe | Civil registration births |
| Ernest Constant Lambrechts Or Decroon | Child | 1884 | Brugge | Civil registration births |
| Ernst Constant Lambrechts>Decroon | Gewettigd kind | 1887 | Brussel | Civil registration marriages |
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