Hwfa ap Iorwerth

See Peter Bartrum https://www.geni.com/documents/view?doc_id=6000000173392255924 (June 2, 2023; Anne Brannen, curator)

See Peter Bartrum. https://www.geni.com/documents/view?doc_id=6000000173393013948 (April 30, 2023; Anne Brannen, curator)

See Peter Bartrum, https://cadair.aber.ac.uk/dspace/bitstream/handle/2160/5120/bleddyn... (December 24, 2016; Anne Brannen, curator)

See Darrell Wolcott, "Cadfael Ynfyd," http://www.ancientwalesstudies.org/id150.html - for help in the untangling of these lines (May 26, 2016; Anne Brannen, curator).

Please see Darrell Wolcott: Cadafael Ynfyd of Cydewain; http://www.ancientwalesstudies.org/id150.html. (Steven Ferry, July 10, 2020.)

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