| Name | Role | Place | Source | |
|---|---|---|---|---|
| Caroline Rosalie Mathilde De Coster | Mother of groom | 1904 | Schaarbeek | Civil registration marriages |
| Mathilde Caroline Coster | Registered | 1860 | Weesp | Population register |
| Mathilde Caroline Coster | Registered | Breukelen | Population register | |
| Mathilde Caroline Coster | Deceased | 1870 | Weesp, Amsterdam | Civil registration deaths |
| Mathilde Caroline Victorine De Coster | Bride | 1904 | Schaarbeek | Civil registration marriages |
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