| Name | Role | Place | Source | |
|---|---|---|---|---|
| Marie Mathilde Piero | Mother of groom | 1899 | Schaarbeek | Civil registration marriages |
| Marie Mathilde Piero | Mother of groom | 1902 | Elsene | Civil registration marriages |
| Marie Mathilde Piero | Mother of bride | 1900 | Etterbeek | Civil registration marriages |
| Mathilde Piero | Mother | 1881 | Strijpen | Civil registration births |
| Mathilde Piero | Mother | 1884 | Strijpen | Civil registration deaths |
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