See Peter Bartrum, https://cadair.aber.ac.uk/dspace/bitstream/handle/2160/5253/cydifor... (September 27, 2020; Anne Brannen, curator)

Please see Darrell Wolcott: Bartrum's "Pedigrees of the Welsh Tribal Patriarchs" #5 Rhys Chwith; http://www.ancientwalesstudies.org/id173.html. (Steven Ferry, September 10, 2019.)

Please see Darrell Wolcott: Llewelyn ap Hoedliw, Lord of Is Cerdin; http://www.ancientwalesstudies.org/id154.html. (Steven Ferry, September 11, 2020.)

Please see Darrell Wolcott: Llowdden Hen of Ulwch Aeron; http://www.ancientwalesstudies.org/id262.html. (Steven Ferry, March 20, 2021.)

Please see Peter Bartrum: Cydifor ap Dinawal 1: https://www.geni.com/documents/view?doc_id=6000000173378013067. Bartrum gives him a son, Hywel, but that man descends from an earlier Cydifor ap Dyfnwal: Hywel ap Rhys (Steven Ferry, November 23, 2024.)

--------------------------

https://play.google.com/books/reader?id=VxdVAAAAcAAJ&printsec=front...

See Peter Bartrum, https://www.geni.com/documents/view?doc_id=6000000173378013067 Cydifor ap Dinawal 1 (October 18, 2023; Anne Brannen, curator)

yDNA R1b1a2a1a1b4 (2013)

For information about his DNA, see: http://www.griffith.dna.rdgriffith.com/pedigrees.html