Gwenhwyfar verch Mathew

See Peter Bartrum, https://www.geni.com/documents/view?doc_id=6000000173426891947 (April 19, 2023; Anne Brannen, curator)

See Peter Bartrum, https://www.geni.com/documents/view?doc_id=6000000173427360001 (April 18, 2023; Anne Brannen, curator)

See Darrell Wolcott, the Pedigree of Cynddelw Gam, for the untangling of these lines: http://www.ancientwalesstudies.org/id94.html (April 11, 2016; Anne Brannen, curator).

Please see Darrell Wolcott: Pedigree of Cynddelw Gam of Ystrad Alun; http://www.ancientwalesstudies.org/id94.html; [#266] (Steven Ferry, December 5, 2017.)