In 1069 at the Battle of Mechain fought in Radnorshire, Powys the brothers Maredudd Cadelling and Idwal Cadelling attempted to regain control of Radnorshire, Powys from brothers Bleddyn ap Cynfyn King Gwynedd King Powys and Rhiwallon ap Cynfyn Mathrafal. Rhiwallon ap Cynfyn Mathrafal and Idwal Cadelling were killed. Maredudd Cadelling died of exposure following the battle.