Rhydderch ab Elgan

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

Please see Darrell Wolcott: Ifor Bach, Lord of Senghenydd; http://www.ancientwalesstudies.org/id316.html (Steven Ferry, August 10, 2023.)