Nielsen Hayden genealogy
Descendants of Gruffudd ap Hywel ap Maredudd ab Einion
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Father: Hywel ap Maredudd ab Einion ap Caradog
(Abt 1230 - ??)
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Gruffudd ap Hywel ap Maredudd ab Einion (Abt 1270 - ??)
       └─ Nest ferch Ieuan ap Gruffudd
(of Eifionydd, Caernarvonshire, Wales - ??)
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Dafydd Fychan ap Dafydd Llwyd ap Cynwrig
(of Trefeilir in Malltraeth, Anglesey, Wales - ??)
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           └─ Margred ferch Dafydd Vychan
(of Trefeilir in Malltraeth, Anglesey, Wales - ??) =>
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