| Name | Role | Place | Source | |
|---|---|---|---|---|
| Edouard Florimont François Marie de Mercy Argenteau | Child | 1845 | Liège | Civil registration births |
| Edouard Joseph Mercy | Child | 1888 | Huy | Civil registration births |
| Edouard Mercy | Child | 1887 | Marchienne-au-Pont | Civil registration births |
| Edouard Mercy | Groom | 1904 | Huldenberg | Civil registration marriages |
| Jean Edouard Mercy | Child | 1822 | Kortijk | Civil registration births |
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