| Name | Role | Place | Source | |
|---|---|---|---|---|
| Jan Mathias Groels | Father | 1872 | Maastricht | Civil registration deaths |
| Mathias Groels | Groom | 1876 | Kerkrade | Civil registration marriages |
| Mathias Josephus Hubertus Groels | Deceased | 1856 | Heer | Civil registration deaths |
| Mathias Josephus Hubertus Groels | Child | 1854 | Heer en Keer | Civil registration births |
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