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Male Lord of Ynys Mon Maelgwyn Oychon ap Owain Click to view Lord of Ynys Mon Maelgwyn Oychon ap Owain in the family tree

Maelgwyn was born in 1136 in Caernarvonshire, Gwynedd, North Wales.1   Maelgwyn's father was Prince of Gwynedd Owain ap Gruffydd and his mother was Gwladus verch Llywarch.  His paternal grandparents were King of Gwynedd Gruffydd ap Cynan and Angharad verch Owain; his maternal grandparents were Llywarch ap Trahaearn and Dyddgu verch Iowerth. He had five brothers and three sisters, named Iowerth, Owain, Dafydd, Rhodri, Cynan, Margred, Gwenllian and Angarad.  He was the fourth youngest of the nine children. He had a half-sister named Angharad.

1 http://wc.rootsweb.ancestry.com/cgi-bin/igm.cgi?op=GET&db=clcaldwell&id=I027307

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