Identified in some secondary sources as Iwerydd, widow of Edwyn ap Gronwy, and daughter of Cynfyn ap Gwerystan. As far as I can determine, this is chronologically impossible.
Marriage Information:
. . . ferch Cynfyn married Gwrgan ab Ithel of Morgannwg. (Gwrgan ab Ithel died in 1030.)
General Notes: