N.N. ferch Merfyn

Please see Darrell Wolcott: Bartrum's "Pedigrees of the Welsh Tribal Patriarchs" #22 Collwyn ap Tangno: http://www.ancientwalesstudies.org/id192.html. (Steven Ferry, September 29, 2019.)

Please see Darrell Wolcott: The Royal Family of Powys - Powys Succession after 823; http://www.ancientwalesstudies.org/id13.html. (Steven Ferry, October 17, 2019.)

Please see Darrell Wolcott: The Men of Lleyn - How They Got There; http://www.ancientwalesstudies.org/id118.html. (Steven Ferry, August 17, 2020.)

Please see Darrell Wolcott: The Children of Rhodri Mawr; http://www.ancientwalesstudies.org/id264.html. (Steven Ferry, April 6, 2021.)

Please see Darrell Wolcott: Ancestry of King Rhys ap Tewdwr of Deheubarth; http://www.ancientwalesstudies.org/id309.html (Steven Ferry, January 12, 2023.)

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Yale Genealogy and History of Wales. the British Kings and Princes. Life of Owen Glyndwr. Biographies of Governor Elihu Yale ... Linus Yale, Sr. , and Linus Yale, Jr... . Maurice Fitz Gerald ... Roger de Montgomery ... and Other Noted Persons by Rodney Horace 1864-1937 Yale (2016, Hardcover)