Iorwerth Hen ab Owain

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

See Peter Bartrum, https://cadair.aber.ac.uk/dspace/bitstream/handle/2160/4930/Tudur%2... (August2, 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 26, 2016; Anne Brannen, curator).

Please see Darrell Wolcott: Pedigree of "Ednowain Bendew II"; http://www.ancientwalesstudies.org/id92.html, [#35] [#58] (Steven Ferry, October 30, 2017.)

Please see Darrell Wolcott: Pedigree of Cynddelw Gam of Ystrad Alun; http://www.ancientwalesstudies.org/id94.html; [#196] [#254] (Steven Ferry, December 3, 2017.)

Please see Darrell Wolcott: The Other "Sir Roger of Powys"; http://www.ancientwalesstudies.org/id56.html. (Steven Ferry, July 3, 2020.)

Please see Darrell Wolcott: The Ancestry of Owain Glyndwr; http://www.ancientwalesstudies.org/id200.html. (Steven Ferry, September 13, 2020.)

Please see Darrell Wolcott: Dating & Identifying Unfamiliar Welsh Families; http://www.ancientwalesstudies.org/id250.html. (Steven Ferry, December 2, 2020.)

Please see Darrell Wolcott: Women in Early Welsh Pedigrees; http://www.ancientwalesstudies.org/id251.html (Steven Ferry, January 1, 2021.)

Please see Darrell Wolcott: Cynwrig ap Rhiwallon; http://www.ancientwalesstudies.org/id293.html (Steven Ferry, May 8, 2022.)

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