Rhydderch ap Tewdwr

See Darrell Wolcott, http://www.ancientwalesstudies.org/id187.html, "The Children of Lord Rhys," for untangling of these lines. (April 21, 2016, Anne Brannen, curator)

See Peter Bartrum, https://cadair.aber.ac.uk/dspace/bitstream/handle/2160/5055/bleddyn... (December 24, 2016; Anne Brannen)

Please see Darrell Wolcott: Bartrum's "Pedigrees of the Welsh Tribal Patriarchs"' # 4 Cadwgan Fantach; http://www.ancientwalesstudies.org/id172.html. (Steven Ferry, September 7, 2019.)

Please see Darrell Wolcott: The Royal Family of Gwynedd - Einion ap Llywarch of Carmarthenshire; http://www.ancientwalesstudies.org/id163.html. (Steven Ferry, January 21, 2020.)

Please see Darrell Wolcott: The Children of Lord Rhys; http://www.ancientwalesstudies.org/id187.html. (Steven Ferry, September 15, 2020.)

Please see Darrell Wolcott: The 'Next Heir' of Morgan of Caerleon; http://www.ancientwalesstudies.org/id214.html. (Steven Ferry, September 18, 2020.)

Please see Darrell Wolcott: Einion ap Celynin of Llwydiarth; http://www.ancientwalesstudies.org/id138.html. (Steven Ferry, October 17, 2020.)

Please see Peter Bartrum: https://www.geni.com/documents/view?doc_id=6000000173392689930 (Steven Ferry, November 29, 2020.)

Please see Darrell Wolcott: Ancestry of King Rhys ap Tewdwr of Deheubarth; http://www.ancientwalesstudies.org/id309.html (Steven Ferry, January 4, 2023.)

Please see Darrell Wolcott: Welshmen Named Maenyrch; http://www.ancientwalesstudies.org/id310.html (Steven Ferry, January 23, 2023.)