Ieuan ap Gruffudd

See Peter Bartrum, https://cadair.aber.ac.uk/dspace/bitstream/handle/2160/4737/Bleddyn... (March 23, 2017; Anne Brannen, curator)

See Peter Bartrum, https://cadair.aber.ac.uk/dspace/bitstream/handle/2160/4941/gollwyn... (October 7, 2020; Anne Brannen, curator)

See Peter Bartrum, https://cadair.aber.ac.uk/dspace/bitstream/handle/2160/5318/Gollwyn... (October 7, 2020; Anne Brannen, curator)

See Darrell Wolcott, http://www.ancientwalesstudies.org/id92.html -- "The Pedigree of Ednywain Bendew" -- for untangling of these lines. (April 18, 2016, Anne Brannen, curator)

Please see Darrell Wolcott: Pedigree of "Ednowain Bendew II"; http://www.ancientwalesstudies.org/id92.html, [#60] (Steven Ferry, October 30, 2017.)

Please see Darrell Wolcott: The Muddled Pedigrees of Sir John Wynn of Gwydir; http://www.ancientwalesstudies.org/id115.html. (Steven Ferry, March 28, 2020.)

Please see Darrell Wolcott: Hwfa ap Cynddelw, Lord of Llifon: http://www.ancientwalesstudies.org/id322.html (Steven Ferry, February 1, 2024.)