| Name | Role | Place | Source | |
|---|---|---|---|---|
| Jean Léonard Mathieu Cleven | Groom | 1910 | Brussel | Civil registration marriages |
| Mathieu Cleven | Partij | 1910 | Heerlen | Notarial records |
| Mathieu Cleven | Genoemde | 1909 | Heerlen | Notarial records |
| Mathieu Cleven | Deceased | 1937 | Nieuwstadt | Civil registration deaths |
| Mathieu Cleven | Partij | 1910 | Heerlen | Notarial records |
| Mathieu Cleven | Partij | 1909 | Heerlen | Notarial records |
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