Ieuan ab Iorwerth Goch

See Peter Bartrum, https://cadair.aber.ac.uk/dspace/bitstream/handle/2160/4820/Cilmin%... (July 11, 2020; Anne Brannen, curator)

See Darrell Wolcott, "The Pedigree of Cynddelw Gam," http://www.ancientwalesstudies.org/id94.html for untangling and clarification of these lines. (January 18, 2016, Anne Brannen, curator)

Please see Darrell Wolcott: The Pedigree of Cynddelw Gam of Ystrad Alun; http://www.ancientwalesstudies.org/id94.html; [#68] (Steven Ferry, November 19, 2017.)