| Name | Role | Place | Source | |
|---|---|---|---|---|
| Alexandre Clemens | Witness | 1881 | Laken | Civil registration marriages |
| Alexandre Clemens | Witness | 1891 | Brussel | Civil registration marriages |
| Alexandre Clemens | Witness | 1881 | Laken | Civil registration marriages |
| Jean Joseph Alexandre Clemens | Child | 1890 | Liège | Civil registration births |
| Servais Alexandre Clemens | Father of bride | 1899 | Brussel | Civil registration marriages |
| Servais Alexandre Clemens | Father | 1888 | Antwerpen | Civil registration deaths |
| Servais Alexandre Clemens | Father of groom | 1906 | Laken | Civil registration marriages |
| Servais Alexandre Clemens | Groom | 1876 | Laken | Civil registration marriages |
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