Custennin Ddu "The Black" ab Iago

See Peter Bartrum, https://cadair.aber.ac.uk/dspace/bitstream/handle/2160/6516/TABLES%... (May 27, 2018; Anne Brannen, curator)

Please see Darrell Wolcott: The "Malpas" Family in Cheshire; http://www.ancientwalesstudies.org/id152.html. (Steven Ferry, April 19, 2020.)

Please see Darrell Wolcott: Maredudd ap Owain, King of Deheubarth; http://www.ancientwalesstudies.org/id206.html. (Steven Ferry, July 17, 2020.)

Please see Darrell Wolcott: The Era of Llewelyn ap Seisyll; http://www.ancientwalesstudies.org/id207.html. (Steven Ferry, July 19, 2020.)