Cadwgan ap Gronwy

See Peter Bartrum, https://cadair.aber.ac.uk/dspace/bitstream/handle/2160/4701/Edwin%2... (November 5, 2018; Anne Brannen, curator)

See Darrell Wolcott, the Pedigree of Cynddelw Gam, for the untangling of these lines: http://www.ancientwalesstudies.org/id94.html (March 24, 2016; Anne Brannen, curator).

Please see Darrell Wolcott: Pedigree of Cynddelw Gam of Ystrad Alun; http://www.ancientwalesstudies.org/id94.html; [#268] (Steven Ferry, December 5, 2017.)

Please see Darrell Wolcott: Hywel ap Maredudd ap Bleddyn; http://www.ancientwalesstudies.org/id295.html. (Steven Ferry, August 18, 2022.)

Please see Darrell Wolcott: Kingship of Gwynedd - 1170 to 1175: http://www.ancientwalesstudies.org/id301.html (Steven Ferry, September 8, 2022.)