Cynfelyn ap Cadrod Calchfynydd

Please see Darrell Wolcott: The Welsh Ancestry of the Tudor Dynasty; http://www.ancientwalesstudies.org/id217.html. (Steven Ferry, September 30, 2022.)

Please see Darrell Wolcott: "Bartrum's Pedigrees of the Welsh Tribal Patriarchs" - #27 - Dafydd ap Llywarch of Eglwys Bach; http://www.ancientwalesstudies.org/id257.html. (Steven Ferry, September 30, 2022.)

Please see Darrell Wolcott: Who Was Yspwys in Welsh History?; http://www.ancientwalesstudies.org/id303.html (Steven Ferry, September 30, 2022.)