The St. John Genealogy Project
Origin and Ancestry DNA Database & Electronic Archive
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 | Madog ab Iestyn, arglwydd of Rhuthin (1100- )
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 | Jonet ferch Ynyr "Fychan" (1100- )
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| Gruffudd ab Ifor "Bach", arglwydd of Senghennydd (1130-1211)
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| Mabel of Gloucester (1128-1183)
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| Rhys ap Gruffudd (1170-1256)  |
| Nest ferch Gruffudd (1170- ) |
| [unknown] ferch Gruffudd (1170- ) |
| [unknown] ferch Gruffudd (1170- ) |
| Hywel ap Madog (1130- )
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| Mawd ferch Gruffudd (1170- )
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| Iorwerth ap Hywel (1170- ) |
| Ieuan ap Hywel (1170- ) |
| Cynwrig ap Hywel (1200- ) |
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