Cynddelw ab Iorwerth

See Darrell Wolcott, "The Pedigree of Cynddelw Gam," http://www.ancientwalesstudies.org/id94.html for untangling and clarification of these lines. (January 21, 2016, Anne Brannen, curator)

See Darrell Wolcott -- http://www.ancientwalesstudies.org/id138.html -- "Einion ap Celynin" -- for clarification of these lines. (April 26, 2016; Anne Brannen, curator)

See Peter Bartrum, http://cadair.aber.ac.uk/dspace/bitstream/handle/2160/4985/aleth%20... (October 28, 2016; Anne Brannen, curator)

Please see Darrell Wolcott: Pedigree of Cynddelw Gam of Ystrad Alun; http://www.ancientwalesstudies.org/id94.html; [#147] (Steven Ferry, December 12, 2017.)

Please see Darrell Wolcott: Einion ap Celynin of Llwydiarth; http://www.ancientwalesstudies.org/id138.html. (Steven Ferry, October 17, 2020.