See Darrell Wolcott, "The Pedigree of Cynddelw Gam," http://www.ancientwalesstudies.org/id94.html for untangling and clarification of these lines. (January 17, 2016, Anne Brannen, curator)

Please see Darrell Wolcott: The Royal Family of Gwynedd: Einion ap Llywarch of Carmanthenshire; http://www.ancientwalesstudies.org/id163.html. (Steven Ferry, April 8, 2017.)

Please see Darrell Wolcott: The Pedigree of Cynddelw Gam of Ystrad Alun; http://www.ancientwalesstudies.org/id94.html; [#51] (Steven Ferry, November 17, 2017.)

Please see Darrell Wolcott: Sir Aaron ap Rhys, Knight of the Sepulchre; http://www.ancientwalesstudies.org/id292.html. (Steven Ferry, March 15, 2022.)

Please see Peter Bartrum: Cydifor Fawr 1; https://www.geni.com/documents/view?doc_id=6000000173378600041 & Marchudd 4; https://www.geni.com/documents/view?doc_id=6000000173392791892 [conflated with Sir Aaron ap Rhys, Knight of the Sepulchre] (Steven Ferry, March 14, 2025.)