| Name | Role | Place | Source | |
|---|---|---|---|---|
| Mathieu Decock | Witness | 1904 | Etterbeek | Civil registration marriages |
| Mathieu Decock | Deceased | 1845 | Tubize | Civil registration deaths |
| Mathieu Decock | Father of groom | 1880 | Schaarbeek | Civil registration marriages |
| Mathieu Decock | Father of bride | 1875 | Overijse | Civil registration marriages |
| Mathieu Decock | Father of bride | 1870 | Tervuren | Civil registration marriages |
| Mathieu Joseph Decock | Deceased | 1807 | Antwerpen | Civil registration deaths |
| Mathieu de Decock | Registered | Amsterdam | Waterloo gratificaties 1815 |
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