Teithwalch ab Owain

See Peter Bartrum, https://www.geni.com/documents/view?doc_id=6000000173395725864 (February 5, 2023; Anne Brannen, curator)

See Darrell Wolcott, "Llewelyn ap Hoedliw" -- http://www.ancientwalesstudies.org/id154.html -- for the untangling of these lines. (April 25, 2016; Anne Brannen, curator)

Please see Darrell Wolcott: The Royal Family of Gwynedd - Wikipedia's Lame Biography of Rhodri Mawr; http://www.ancientwalesstudies.org/id165.html. (Steven Ferry, January 26, 2020.)

Please see Darrell Wolcott: Sorting Out the Gwaithfoeds; http://www.ancientwalesstudies.org/id125.html. (Steven Ferry, September 5, 2020.)

Please see Darrell Wolcott: The Legendary Kingdom of Seisyllwg; http://www.ancientwalesstudies.org/id123.html. (Steven Ferry, September 11, 2020.)

Please see Darrell Wolcott: Early Ceredigion and its Rulers; http://www.ancientwalesstudies.org/id158.html. (Steven Ferry, September 11, 2020.)

Please see Darrell Wolcott: Llewelyn ap Hoedliw, Lord of Is Cerdin; http://www.ancientwalesstudies.org/id154.html. (Steven Ferry, September 11, 2020.)

Please see Darrell Wolcott: Harleian Ms 3859; http://www.ancientwalesstudies.org/id129.html. (Steven Ferry, March 11, 2021.)