Ancestry of
Gwilym ap Griffith
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1st Generation
2nd Generation
2. Griffith ap Heilyn (–c1340)
3. Eva -----
3rd Generation
6. Griffith ap Tudor (–c1310)
4th Generation
10. Bleddyn ap Owen
12. Tudor ap Madog
5th Generation
16. Ednyfed Fychan (–1246)
17. Tangwystl -----
20. Owen Brogentyn
24. Madog ap Iarddur
6th Generation
32. Cynwrig -----
48. Iarddur -----
7th Generation
8th Generation
160. Bleddyn -----