The St. John Genealogy Project
Origin and Ancestry DNA Database & Electronic Archive
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 | Gwilym ap Llywelyn (1370- )
|
 | Gwladus ferch Dafydd "Melyn" (1400- )
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| Morgan ap Gwilym (1400- )  |
| Thomas ap Gwilym (1400-1451) |
| Ieuan "Ddû" ap Gwilym (1400- ) |
| [unknown] ferch Gwilym (1400- ) |
| Mabli ferch Gwilym (1400- ) |
| Margred ferch Gwilym (1400- ) |
| [unknown] ferch Gwilym (1400- ) |
| Gwenllian ferch William (1400- ) |
| Gwilym ap Thomas "Fychan" (1400- )
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| Gwladus ferch John (1400- )
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| Elen "Llwyd" ferch Gwilym (1400- ) |
| Henry ap Gwilym (1400-1494) |
| Llywelyn ap Gwilym (1400- ) |
| Hywel ap Gwilym (1400- ) |
| Gwilym "Foel" ap Gwilym (1400- ) |
| Thomas "Ddû" ap Gwilym (1400- ) |
| John ap Gwilym (1400- ) |
| Gwilym "Fychan" ap Gwilym (1400-1491) |
| Llywelyn ap Gwilym (1400-1431)
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| Gwenllian ferch Gwilym (1400- )
|
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