Hywel Y Gwion Gam (Grandson, Lame) ab Ieuaf

See Darrell Wolcott, "The Pedigree of Cynddelw Gam," http://www.ancientwalesstudies.org/id94.html for untangling and clarification of these lines. (January 18, 2016, Anne Brannen, curator)

Please see Darrell Wolcott: The Pedigree of Cynddelw Gam of Ystrad Alun; http://www.ancientwalesstudies.org/id94.html; [#61] (Steven Ferry, November 19, 2017.)

Please see Darrell Wolcott: The Royal Family of Gwynedd - Gwron, Son of Cunedda; http://www.ancientwalesstudies.org/id63.html. (Steven Ferry, November 25, 2019.)