The St. John Genealogy Project
Origin and Ancestry DNA Database & Electronic Archive
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 | Iwerydd ferch Lewys (1230- ) |
 | Gwilym "Sais" ap Madog (1230- )  |
| Madog "Fychan" ap Madog (1230- ) |
| Ieuan "Byr" ap Madog (1230- ) |
| Ieuan "Hîr" ap Madog (1230- ) |
| Thomas ap Madog (1270- ) |
| Gruffudd ap Madog (1270- ) |
| Joan ferch Madog (1270- ) |
| Rhys ap Gronwy, lord of Glyn-nedd (1270- )
|
| Joan ferch Llywelyn (1300- )
|
| Llywelyn ap Rhys (1300-1360) |
| Gruffudd ap Rhys (1300- ) |
| Joan ferch Rhys (1270- )
|
| Llywelyn ap Madog (1230- )
|
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