| Name | Role | Place | Source | |
|---|---|---|---|---|
| Hansz Reychardt vonn Syberch | Registered | 1627 | Stadsgericht | |
| Johannes Steern de Syberch | Registered | 1430 | Leuven | Registration Register |
| Syberch | Baptized | 1586 | Sneek | Church records baptisms |
| Syberch Dircxsz | Deceased | 1603 | Leiden | |
| Syberch Huberts | Witness | 1639 | Leiden | |
| h. Jan Syberch presbiter | Registered | 1493 | Wesel | ILVB-register |
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