 However, there is in existence a grant of land from Llywelyn ab Iorworth to the monastery of Wigmore, in which Llywelyn indicates his mother was a member of the house of Corbet, leaving the issue unresolved.In his account of his journey around Wales in 1188, Giraldus Cambrensis mentions that the young Llywelyn was already in arms against his uncles Dafydd and Rhodri;

In 1194, with the aid of his cousins Gruffudd ap Cynan and Maredudd ap Cynan, he defeated Dafydd at the Battle of Aberconwy at the mouth of the River Conwy.Rhodri died in 1195, and his lands west of the Conwy were taken over by Gruffudd and Maredudd while Llywelyn ruled the territories taken from Dafydd east of the Conwy.