| Name | Role | Place | Source | |
|---|---|---|---|---|
| Leonard Mathis van Cleef | Partner | 1841 | Sittard | Civil registration deaths |
| Leonard Mathis van Cleef | Groom | 1838 | Sittard | Civil registration marriages |
| Leonard Mathis van Cleef | Father | 1841 | Sittard | Civil registration births |
| Leonard Mathis van Cleef | Father | 1852 | Sittard | Civil registration births |
| Leonard Mathis van Cleef | Father | 1839 | Sittard | Civil registration births |
| Leonard Mathis van Cleef | Father | 1842 | Sittard | Civil registration deaths |
| Mathis van Cleef | Father | 1948 | Sittard | Civil registration deaths |
| Mathis van Cleef | Father of bride | 1910 | Nieuwstadt | Civil registration marriages |
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