| Name | Role | Place | Source | |
|---|---|---|---|---|
| Lambert Pierre Mathysen | Child | 1799 | Maastricht | Civil registration births |
| Pierre Jean Mathysen | Father | 1805 | Ekeren | Civil registration deaths |
| Pierre Léonard Mathysen | Registered | 1881 | Brussel | Alien files |
| Pierre Léonard Mathysen | Relation | 1881 | Brussel | Alien files |
| Pierre Mathysen | Witness | 1821 | Brussel | Civil registration marriages |
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