Madog ap Rhirid

See Peter Bartrum, https://cadair.aber.ac.uk/dspace/bitstream/handle/2160/5092/bleddyn... (December 24, 2016; Anne Brannen, curator)

See Darrell Wolcott, "The Pedigree of Cynddelw Gam," http://www.ancientwalesstudies.org/id94.html for untangling and clarification of these lines. (February 1, 2016, Anne Brannen, curator)

Please see Darrell Wolcott: The Pedigree of Cynddelw Gam of Ystrad Alun; http://www.ancientwalesstudies.org/id94.html; [#40] (Steven Ferry, November 17, 2017.)

Please see Darrell Wolcott: Henry, the Forgotten Son of Cadwgan ap Bleddyn; http://www.ancientwalesstudies.org/id117.html. (Steven Ferry, April 5, 2020.)

Please see Darrell Wolcott: Edwin of Tegeingl and His Family - Uchdryd ap Edwin - the Younger Son; http://www.ancientwalesstudies.org/id86.html. (Steven Ferry, June 11, 2020.)

Please see Darrell Wolcott: Sandde Hardd of Mortyn; http://www.ancientwalesstudies.org/id30.html. (Steven Ferry, August 8, 2020.)

Please see Darrell Wolcott: Owain ap Cadwgan and Nest ferch Rhys-an Historic Fiction?; http://www.ancientwalesstudies.org/id160.html. (Steven Ferry, August 14, 2020)