Maredudd Benwyn ap Gruffudd

See Peter Bartrum, https://cadair.aber.ac.uk/dspace/bitstream/handle/2160/5248/bod%20h... (November 2, 2019; Anne Brannen, curator)

See Peter Bartrum, https://cadair.aber.ac.uk/dspace/bitstream/handle/2160/4798/Bod%20H... (October 30, 2019; Anne Brannen, curator)

Please see Darrell Wolcott: Bartrum's "Pedigrees of the Welsh Tribal Patriarchs" #18 Maredudd Benwyn; http://www.ancientwalesstudies.org/id188.html. (Steven Ferry, September 23, 2019.)

Please see Darrell Wolcott: The Royal Family of Powys - Powys Dynastic Family 945-1385; http://www.ancientwalesstudies.org/id20.html. (Steven Ferry, October 19, 2019.)

Please see Darrell Wolcott: The 5 Dafydd Llwyds of Llanwrin Parish; http://www.ancientwalesstudies.org/id254.html. (Steven Ferry, February 12, 2021.)

Please see Darrell Wolcott: Pedigree of Madog ap Idnerth; http://www.ancientwalesstudies.org/id267.html; [#119]. (Steven Ferry, June 21, 2021.)