Sir Rhys ap Gruffudd

See Peter Bartrum, https://cadair.aber.ac.uk/dspace/bitstream/handle/2160/4730/Marchud... (May 25, 2019; 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 22, 2016, Anne Brannen, curator)

Please see Darrell Wolcott: Pedigree of Cynddelw Gam of Ystrad Alun; http://www.ancientwalesstudies.org/id94.html; [#123] (Steven Ferry, November 23, 2017.)

Please see Darrell Wolcott: Selyf, "Brennin" Dyfed; http://www.ancientwalesstudies.org/id261.html. (Steven Ferry, March 18, 2021.)

Please see Darrell Wolcott: Hwfa ap Cynddelw, Lord of Llifon: http://www.ancientwalesstudies.org/id322.html (Steven Ferry, January 23, 2024.)