| Name | Role | Place | Source | |
|---|---|---|---|---|
| Prosper Désire Mathys | Registered | Brussel | Alien files | |
| Prosper Désiré Mathys | Relation | Brussel | Alien files | |
| Prosper Eugeen Mathys | Deceased | 1978 | Gent | Prayer card collection |
| Prosper Mathys | Witness | 1902 | Schaarbeek | Civil registration marriages |
| Prosper Mathys | Witness | 1893 | Vorst | Civil registration marriages |
| Prosper Mathys | Registered | 1885 | Ninove | Population register |
| Prosper Mathys | Witness | 1890 | Jette | Civil registration marriages |
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