Adda ap Cunedda

Please see Darrell Wolcott: Bartrum's "Pedigrees of the Welsh Tribal Patriarchs" #19 Gruffudd Fraslwyd; http://www.ancientwalesstudies.org/id189.html. (Steven Ferry, September 27, 2019.)

Please see Darrell Wolcott: Pedigree of Madog ap Idnerth; http://www.ancientwalesstudies.org/id267.html; [#93]. (Steven Ferry, June 17, 2021.)

Please see Peter Bartrum: Trahaearn ap Cardog 4; https://www.geni.com/documents/view?doc_id=6000000173393013938 (Steven Ferry, April 17, 2023.)