Y Gwreng ap Gronwy

See Darrell Wolcott, http://www.ancientwalesstudies.org/id50.html -- for an discussion of the possible Welsh origins of the name "Peverell," and a genealogy for this line.

Please see Darrell Wolcott: Welsh Origins of the Peverel Family; http://www.ancientwalesstudies.org/id50.html. (Steven Ferry, April 15, 2020.)

Please see Darrell Wolcott: Rhiryd ap Rhiwallon - Who Was He?; http://www.ancientwalesstudies.org/id323.html [NOTE: Wolcott makes the case that this man is the c. 970 Bleddyn who sits atop the Cynllaith family charts,Bleddyn y Gwreng ap Gronwy ] (Steven Ferry, March 29, 2024.)