Vortepir ab Aergul Lawhir

See Peter Bartrum, https://www.geni.com/documents/view?doc_id=6000000173393650888 (February 6, 2023; Anne Brannen, curator)

Please see Darrell Wolcott: Maxen Wledig and the Welsh Genealogies; http://www.ancientwalesstudies.org/id19.html. (Steven Ferry, February 6, 2020.)

Please see Darrell Wolcott: Anwn Dynod ap Maxen Wledig; http://www.ancientwalesstudies.org/id21.html. (Steven Ferry, February 13, 2020.)

Please see Darrell Wolcott: The Father of Tewdrig of Gwent; http://www.ancientwalesstudies.org/id27.html. (Steven Ferry, February 22, 2020.)

Please see Darrell Wolcott: Rulers of Brycheiniog - The Unanswered Questions; http://www.ancientwalesstudies.org/id161.html. (Steven Ferry, March 16, 2020.)

Please see Darrell Wolcott: Two Families Headed by a Rhydderch ap Iestyn; http://www.ancientwalesstudies.org/id212.html. (Steven Ferry, July 18, 2020.)

Please see Darrell Wolcott: Harleian Ms 3859; http://www.ancientwalesstudies.org/id129.html. (Steven Ferry, March 8, 2021.)