The St. John Genealogy Project
Origin and Ancestry DNA Database & Electronic Archive
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 | Gwilym ap Rhys "Llwyd" (1370- )
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 | Margred ferch John (1370- )
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| Philip ap Gwilym (1400- )  |
| Rhys ap Gwilym (1400- ) |
| [unknown] ferch Gwilym (1400- ) |
| [unknown] ferch Gwilym (1400- ) |
| [unknown] ferch Gwilym (1400- ) |
| [unknown] ferch Gwilym (1400- ) |
| [unknown] ferch Gwilym (1400- ) |
| Nest ferch Gwilym (1400- ) |
| Mallt ferch Gwilym (1400- ) |
| Gwenllian ferch Gwilym (1400- ) |
| Sir Dafydd "Gam" ap Llywelyn Line 3, Knight (1370-1415)
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| Gwenllian ferch Gwilym (1370- )
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| Morgan ap Dafydd "Gam" (1400- ) |
| Thomas ap Dafydd "Gam" (1400- ) |
| Gwladus ferch Dafydd "Gam" (1400-1454) |
| [unknown] ferch Dafydd "Gam" (1400- ) |
| Llywelyn ap Gwilym (1400- )
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| Margred ferch Dafydd "Gam" (1400- )
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