| Name | Role | Place | Source | |
|---|---|---|---|---|
| Jean Prosper Seconde | Groom | 1889 | Schaarbeek | Civil registration marriages |
| Joannes Prosper Seconde | Registered | 1862 | Ninove | Population register |
| Joannes Prosper Seconde | Registered | 1862 | Ninove | Population register |
| Prosper Seconde | Witness | 1902 | Laken | Civil registration marriages |
| Prosper Seconde | Witness | 1901 | Sint-Jans-Molenbeek | Civil registration marriages |
| Prosper Seconde | Witness | 1910 | Sint-Agatha-Berchem | Civil registration marriages |
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