About Lles Llyddog ap Ceidio, Brenin Powys
See Darrell Wolcott, "The Clan of Tudor Trevor," for work on untangling these lines -- http://www.ancientwalesstudies.org/id55.html (May 26, 2016, Anne Brannen, curator).
Also See Wolcott, Second Powys Dynasty Chart II, http://www.ancientwalesstudies.org/id99.html (December 10, 2016)
Please see Darrell Wolcott: Edwin of Tegeingl and His Family - The Ancestry of Edwin of Tegeingl; http://www.ancientwalesstudies.org/id42.html. (Steven Ferry, April 17, 2017.)
Please see Darrell Wolcott: Idnerth Benfras of Maesbrook; http://www.ancientwalesstudies.org/id54.html. (Steven Ferry, April 22, 2017.)