Ieuan Blaen ap Gruffydd

The 1st Blayney; a/k/a Ieuan ap Gruffudd ap Llywelyn ab Einion ap Llywelyn ap Meilir Gryg

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Please see Darrell Wolcott: Bartrum's "Pedigrees of the Welsh Tribal Patriarchs" #20 Meilyr Gryg; http://www.ancientwalesstudies.org/id190.html. (Steven Ferry, September 24, 2019.)

Please see Darrell Wolcott: The Royal Family of Powys - The "Sons" of Cyngen ap Cadell; http://www.ancientwalesstudies.org/id11.html. (Steven Ferry, October 13, 2019.)

Please see Darrell Wolcott: The Royal Family of Powys - Powys Succession after 823; http://www.ancientwalesstudies.org/id13.html. (Steven Ferry, October 15, 2019.)

Please see Darrell Wolcott: The Royal Family of Powys - The First Meilyr Gryg of Gregynog; http://www.ancientwalesstudies.org/id73.html. (Steven Ferry, November 16, 2019.)

Please see Darrell Wolcott: The Shropshire Walcot Family- Chart III: First Powys Dynasty; http://www.ancientwalesstudies.org/id98.html. (Steven Ferry, May 17, 2020.)

Please see Darrell Wolcott: Einion ap Celynin of Llwydiarth; http://www.ancientwalesstudies.org/id138.html. (Steven Ferry, October 20, 2020.)

Please see Darrell Wolcott: Pedigree of Madog ap Idnerth; http://www.ancientwalesstudies.org/id267.html; [#127]. (Steven Ferry, June 22, 2021.)