 It is important to note it was occupied by the Irish for a few years by Banadl (usually given as 441-447 AD), and was united with Gwynedd in 854 upon the death of Cyngen ap Cadell by his nephew Rhodri.King Rhodri the Great of Gwynedd was the son of Merfyn Frych and Cyngen ap Cadell's sister, Nest.He inherited the Kingdom on his uncle's death.