Iorwerth ap Llewelyn

See Peter Bartrum, https://cadair.aber.ac.uk/dspace/bitstream/handle/2160/4817/Cowryd%... (August 21, 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. (March 23, 2016, Anne Brannen, curator)

Please see Darrell Wolcott: Pedigree of "Ednowain Bendew II"; http://www.ancientwalesstudies.org/id92.html, [#66] [#87] (Steven Ferry, November 6, 2017.)

Please see Darrell Wolcott: Pedigree of Cynddelw Gam of Ystrad Alun; http://www.ancientwalesstudies.org/id94.html; [#247] (Steven Ferry, December 2, 2017.)