| Name | Role | Place | Source | |
|---|---|---|---|---|
| Frans Sybertz | Witness | 1907 | Sint-Jans-Molenbeek | Civil registration marriages |
| Frans Sybertz | Father of groom | 1907 | Sint-Jans-Molenbeek | Civil registration marriages |
| Frans Sybertz Bleus | Father | 1765 | Monnickendam | Church records baptisms |
| Frans Sybertz Bleus | Father | 1767 | Monnickendam | Church records baptisms |
| Frans Sybertz Bleus | Father | 1764 | Monnickendam | Church records baptisms |
| Johs. Frans. Antonius Sybertz | Registered | Zuiddorpe | Population register |
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