Adda ab Iorwerth Ddu

See Darrell Wolcott for clarity on the untangling of these lines: http://www.ancientwalesstudies.org/id84.html (January 13, 2016; Anne Brannen, curator)

Please see Darrell Wolcott: The Welsh Ancestry of the Tudor Dynasty; http://www.ancientwalesstudies.org/id217.html. (Steven Ferry, April 8, 2020.)

Please see Darrell Wolcott: Angharad, Heiress of Mostyn; http://www.ancientwalesstudies.org/id84.html. (Steven Ferry, June 21, 2020.)

Please see Darrell Wolcott: The Ancestry of Owain Glyndwr; http://www.ancientwalesstudies.org/id200.html. (Steven Ferry, September 13, 2020.)

Please see Darrell Wolcott: Rhiryd ap Rhiwallon - Who Was He?; http://www.ancientwalesstudies.org/id323.html (Steven Ferry, March 29, 2024.)