The St. John Genealogy Project
Origin and Ancestry DNA Database & Electronic Archive
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 | Gronwy "Fychan" ap Gronwy (1250- )
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 | Generys ferch Hwfa (1270- )
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| Llywelyn ap Gronwy "Fychan" (1300-1353)  |
| Myfanwy ferch Gronwy "Fychan" (1300- ) |
| Ednyfed ap Gronwy "Fychan" (1300- ) |
| Hywel ap Gronwy "Fychan" (1300- ) |
| Robert ab Iorwerth (1270-1340)
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| Alice ferch Ithel "Fychan" (1270- )
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| Llywelyn ap Robert (1300- ) |
| Iorwerth ap Robert (1300- ) |
| Lleucu ferch Robert (1300- ) |
| Angharad ferch Robert (1300- ) |
| Cynwrig ap Robert (1330-1360) |
| Ithel ap Robert (1330-1383) |
| Tangwystl ferch Robert (1330- ) |
| Margred [2nd] ferch Robert (1330- ) |
| Margred [1st] ferch Robert (1300- )
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| Madog ap Gronwy "Fychan" (1300- )
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| Generys ferch Madog (1330-1353) |
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