Hywel ab Ieuan

See Peter Bartrum, https://www.geni.com/documents/view?doc_id=6000000173392923937 (December 4, 2022; Anne Brannen, curator)

See Darrell Wolcott, the Pedigree of Cynddelw Gam, for the untangling of these lines: http://www.ancientwalesstudies.org/id94.html (March 26, 2016; Anne Brannen, curator).

Please see Darrell Wolcott: Pedigree of Cynddelw Gam of Ystrad Alun; http://www.ancientwalesstudies.org/id94.html; [#254] (Steven Ferry, December 3, 2017.)