Owain ap Edwyn ap Goronwy Lord of Englefield ^{1 2 3}

   Another name for Owain was Owen ap Edwyn ap Goronwy Lord of Englefield.

  Research Notes:

Source: The History of the Princes, the Lords Marcher, and the Ancient Nobility of Powys Fadog, and the Ancient Lords of Arwystli, Cedewen, and Meirionydd by J. Y. W. Lloyd, Vol. IV (London, 1884), p. 341
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Source: The History of the Gwydir Family by Sir John Wynne (Oswestry, 1878), p. 12
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From "The Ancestry of Edwin of Tegeingl" by Darrell Wolcott (http://www.ancientwalesstudies.org/id42.htm) :
"In the last years of the eleventh century and the opening years of the next, Owain ap Edwin was installed by the Normans as ruler of Gwynedd after they had caused Gruffudd ap Cynan to flee to Ireland. It earned him the Welsh epithet "Fradwr" or traitor; but it seems clear from the chronicles that this family remained a major player in north Wales until 1125 when three sons of Owain ap Edwin were killed by a son of Gruffudd ap Cynan."

Owain married Morwyl ap Cynfyn, daughter of Cynfyn ap Gwerstan and Angharad verch Maredudd ap Owain. (Morwyl ap Cynfyn was born about 1048.)