Cyngen ap Brochwel

See Peter Bartrum, https://www.geni.com/documents/view?doc_id=6000000173392952886 (February 6, 2023; Anne Brannen, curator)

See Darrell Wolcott, who has worked extensively on untangling the Welsh lines: http://www.ancientwalesstudies.org/id117.html (January 15, Anne Brannen, curator)

Please see Darrell Wolcott: The Pedigree of Cynddelw Gam of Ystrad Alun; http://www.ancientwalesstudies.org/id94.html; [#51] [#141] [#253] [#255] [#257] [#264] [#265] (Steven Ferry, December 4, 2017.)

Please see Darrell Wolcott: Bartrum's "Pedigrees of the Welsh Tribal Patriarchs" #18 Maredudd Benwyn; http://www.ancientwalesstudies.org/id188.html. (Steven Ferry, September 23, 2019.)

Please see Darrell Wolcott: Bartrum's "Pedigrees of the Welsh Tribal Patriarchs" #20 Meilyr Gryg; http://www.ancientwalesstudies.org/id190.html. (Steven Ferry, September 24, 2019.)

Please see Darrell Wolcott: Bartrum's "Pedigrees of the Welsh Tribal Patriarchs" #21 Gwenwys or Cadwgan Wenwys; http://www.ancientwalesstudies.org/id191.html. (Steven Ferry, September 28, 2019.)

Please see Darrell Wolcott: Ancient Powys; http://www.ancientwalesstudies.org/id79.html. (Steven Ferry, October 8, 2019.)

Please see Darrell Wolcott: The Royal Family of Powys - The "Sons" of Cyngen ap Cadell; http://www.ancientwalesstudies.org/id11.html. (Steven Ferry, October 13, 2019.)

Please see Darrell Wolcott: The Royal Family of Powys - Powys Succession after 823; http://www.ancientwalesstudies.org/id13.html. (Steven Ferry, October 15, 2019.)

Please see Darrell Wolcott: The Royal Family of Powys - End of the Powys Dynasty; http://www.ancientwalesstudies.org/id14.html. (Steven Ferry, October 18, 2019.)

Please see Darrell Wolcott: The Royal Family of Powys - Powys Dynastic Family 945-1385; http://www.ancientwalesstudies.org/id20.html. (Steven Ferry, October 19, 2019.)

Please see Darrell Wolcott: The Royal Family of Powys - The First Meilyr Gryg of Gregynog; http://www.ancientwalesstudies.org/id73.html. (Steven Ferry, November 16, 2019.)

Please see Darrell Wolcott: The 1039 Battle at Rhyd y Groes; http://www.ancientwalesstudies.org/id211.html. (Steven Ferry, June 3, 2020.)

Please see Darrell Wolcott: The Enigmatic Elystan Glodrydd; http://www.ancientwalesstudies.org/id199.html. (Steven Ferry, August 11, 2020.)

Please see Darrell Wolcott: Einion ap Celynin of Llwydiarth; http://www.ancientwalesstudies.org/id138.html. (Steven Ferry, August 25, 2020.)

Please see Darrell Wolcott: Three Men Called Iorwerth Goch "ap Maredudd": http://www.ancientwalesstudies.org/id140.html. (Steven Ferry, September 6, 2020.)

Please see Darrell Wolcott: Harleian Ms 3859; http://www.ancientwalesstudies.org/id129.html. (Steven Ferry, March 11, 2021.)