The St. John Genealogy Project
Origin and Ancestry DNA Database & Electronic Archive
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 | Llywelyn "Ddû" ap Gruffudd (1300- )
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 | Jonet ferch Dafydd (1300- )
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| Trahaearn ap Llywelyn "Ddû" (1330-1348)  |
| Hywel ap Llywelyn "Ddû" (1330- ) |
| Einion "Cest" ap Llywelyn (1300- )
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| Margred [1st] ferch Llywelyn (1330- )
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| Tangwystl ferch Einion "Cest" (1330- ) |
| Gwilym ab Einion "Cest" (1330- ) |
| Madog ab Einion "Cest" (1330- ) |
| Margred ferch Einion "Cest" (1330- )
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| Gwilym ap Llywelyn "Ddû" (1330-1356)
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| Nest "y Gryg" ferch Gwilym (1350- ) |
| Gwallter ap Gwilym (1350- ) |
| Catrin ferch Gwilym (1350- ) |
| Einion ap Gwilym (1350- ) |
| Ieuan ap Gwilym (1350- ) |
| Cunedda ap Gwilym (1350- ) |
| Gruffudd ap Gwilym (1370- ) |
| Jenkin ap Gwilym (1370- ) |
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