Powel 1584, p. 69. Powel, David (1584). The historie of Cambria, now called Wales: a part of the most famous Yland of Brytaine, written in the Brytish language aboue two hundreth yeares past. Translated by Llwyd, Humphrey. London: Rafe Newberrie and Henrie Denham. IAhistorieofcambri00cara.
The Houses of Cunedda and Rhodri Mawr, Welsh Medieval Law: The Laws of Howell the Good (1909) by Hywel ap Cadell, translated by Arthur Wade Wade-Evans. See Meredydd (Maredudd) and Owen (King Owain)