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Son of Pebiau "the Great" ap Erb, King of Ergyng and N.N. ferch Custennin Brother of Angwared ap Peibo; Cynfyn ap Peibio, King of Erging; N.N. verch Pebo and Efrddyl ferch Pebio
See Peter Bartrum, https://www.geni.com/documents/view?doc_id=6000000173392863927 (February 6, 2023; Anne Brannen, curator)