
| Name | Gwilym Sais ap MADOG | |
| Birth | Abt 1302 | Merthyr Tudful, Uwch Caeach, Glamorganshire, Wales |
| Gender | Male | |
| Death | Yes, date unknown | |
| Person ID | I29779 | Coombs |
| Last Modified | 17 May 2016 | |
| Family | ||||
| Children |
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| Family ID | F10487 | Group Sheet | Family Chart | ||
| Last Modified | 2 Feb 2026 | |||