| Name | Role | Place | Source | |
|---|---|---|---|---|
| Amabilis Gustavus Isidorus Declercq | Father | 1890 | Antwerpen | Civil registration deaths |
| Ferdinandus Amelia Edgardus Gustavus Declercq | Deceased | 1919 | Aalst | Civil registration deaths |
| Ferdinandus Amelia Edgardus Gustavus Declercq | Child | 1855 | Aalst | Civil registration births |
| Gustavus Cornelius Adolphus Joannes Declercq | Father | 1919 | Aalst | Civil registration deaths |
| Gustavus Cornelius Adolphus Joannes Declercq | Father | 1855 | Aalst | Civil registration births |
| Gustavus Declercq | Witness | 1901 | Bierbeek | Civil registration births |
| Gustavus Declercq | Witness | 1861 | Sint-Gillis | Civil registration marriages |
| Gustavus Declercq | Witness | 1901 | Bierbeek | Civil registration births |
| Gustavus Declercq | Groom | 1904 | Gent | Civil registration marriages |
| Gustavus-Cornelius-Joannes DeClercq | Deceased | 1866 | Aalst | Civil registration deaths |
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