| Name | Role | Place | Source | |
|---|---|---|---|---|
| Leon Heirwegh | Deceased | 1943 | Lokeren, Zele | Rouwbrieven |
| Leon Heirwegh | Deceased | 1998 | Dendermonde, Hamme | Rouwbrieven |
| Léon Heirwegh | Witness | 1899 | Laken | Civil registration marriages |
| Léon Heirwegh | Witness | 1909 | Schaarbeek | Civil registration marriages |
| Léon Victor Heirwegh | Groom | 1903 | Schaarbeek | Civil registration marriages |
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