Arbre d'ascendance:
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Owain "Gwynedd" Ap Gruffydd < Iorwerth "Drwyndwn" Ap Owain < Gwenllian I Verch Owain < Maelgwn Ap Owain < Cynan Ap Owain < Einion Ap Owain < Gwenllian Ii Verch Owain < Rhirid Ap Owain < Madog Ap Owain < Cadell Ap Owain < Cynwrig I Ap Owain < Cynwrig Ii Ap Owain Frères et sœurs Robert Ap Llywarch Elen Verch Llywarch Iorwerth Ap Llywarch Maredudd Ap Llywarch Madog Ap Llywarch |