Owain ap Bleddyn

See Peter Bartrum, https://www.geni.com/documents/view?doc_id=6000000173392791978 (November 8, 2022; Anne Brannen, curator)

See Peter Bartrum, http://cadair.aber.ac.uk/dspace/bitstream/handle/2160/5576/Bleddyn%... (May 30, 2017; Anne Brannen, curator)

See Peter Bartrum, https://cadair.aber.ac.uk/dspace/bitstream/handle/2160/4911/Tudur%2... (June 12, 2018; Anne Brannen, curator)

See Darrell Wolcott, the Pedigree of Cynddelw Gam, for the untangling of these lines: http://www.ancientwalesstudies.org/id94.html (March 3, 2016; Anne Brannen, curator).

Please see Darrell Wolcott: The Clan of Tudor Trevor; http://www.ancientwalesstudies.org/id55.html. (Steven Ferry, May 4, 2017.)

Please see Darrell Wolcott: The Other "Sir Roger of Powys"; http://www.ancientwalesstudies.org/id56.html. (Steven Ferry, May 21, 2017.)

Please see Darrell Wolcott: Pedigree of Cynddelw Gam of Ystrad Alun; http://www.ancientwalesstudies.org/id94.html; [#215] (Steven Ferry, August 27. 2019.)

Please see Darrell Wolcott: The Other Gwenwynwyn; http://www.ancientwalesstudies.org/id167.html. (Steven Ferry, October 7, 2020.)