Collwyn ap Gwyn, of Blaen Cuch

See Peter Bartrum, https://cadair.aber.ac.uk/dspace/bitstream/handle/2160/6516/TABLES%... (June 1, 2018; Anne Brannen, curator)

See Darrell Wolcott, http://www.ancientwalesstudies.org/id125.html -- for the untangling of these lines. (January 14, 2016; Anne Brannen, curator)

Please see Darrell Wolcott: The Conquest of Glamorgan - Einion vs Iestyn ap Gwrgan; http://www.ancientwalesstudies.org/id121.html. (Steven Ferry, August 19, 2020.)

Please see Darrell Wolcott: The Conquest of Glamorgan - Further Notes; http://www.ancientwalesstudies.org/id226.html. (Steven Ferry, August 20, 2020.)

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

Please see Darrell Wolcott: Harleian Ms 3859; http://www.ancientwalesstudies.org/id129.html. (Steven Ferry, March 9, 2021.)

Please see Darrell Wolcott: Gwynfardd Dyfed and His Family; http://www.ancientwalesstudies.org/id263.html. (Steven Ferry, March 22, 2021.)

Please see Darrell Wolcott: Ifor Bach, Lord of Senghenydd; http://www.ancientwalesstudies.org/id316.html (Steven Ferry, August 4, 2023.)