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See Darrell Wolcott: The Herbert Family Pedigrees; http://www.ancientwalesstudies.org/id40.html. (Steven Ferry, April 15, 2017.)
Please see Darrell Wolcott: Ifor Bach, Lord of Senghenydd; http://www.ancientwalesstudies.org/id316.html (Steven Ferry, August 4, 2023.)