The St. John Genealogy Project
Origin and Ancestry DNA Database & Electronic Archive
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 | Iorwerth ap Rhirid (1230-1306)
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 | Nest ferch Iorwerth (1270- )
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| Gwyn ab Iorwerth (1270-1314) |
| Einion ab Iorwerth (1270- ) |
| Catrin ferch Iorwerth (1270- )  |
| Ieuan ab Iorwerth (1270- ) |
| Madog ab Iorworth, Bishop of Bangor (1270-1358) |
| Ithel "Fychan" ab Ithel "Gam" (1230-1302) |
| Adles ferch Richard (1270- )
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| [unknown] ferch Ithel "Fychan" (1270- ) |
| Angharad ferch Ithel "Fychan" (1270- ) |
| Nest ferch Ithel "Fychan" (1270- ) |
| Gwenllian ferch Ithel "Fychan" (1270- ) |
| Adles ferch Ithel "Fychan" (1270- ) |
| [unknown] ferch Ithel "Fychan" (1270- ) |
| [unknown] ferch Ithel "Fychan" (1270- ) |
| [unknown] ferch Ithel "Fychan" (1270- ) |
| 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- ) |
| Margred [1st] ferch 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- ) |
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