Career
They captured five castles in the north of Ceredigion then later in the year launched a second invasion, inflicting a heavy defeat on the Normans at the Battle of Crug Mawr, just outside Cardigan. In 1137 they captured Carmarthen. Gruffudd ap Cynan died in 1137 and was succeeded by Owain Gwynedd, his eldest surviving son.
Cadwaladr was given lands in northern Ceredigion.
Cadwaladr joined with Ranulph, Earl of Chester in the attack on Lincoln in 1141, when King Stephen of England was taken prisoner. This alliance was probably linked to Cadwaladr"s marriage to Alice de Clare, daughter of Richard Fitz Gilbert de Clare.
In 1143 Cadwaladr"s men killed Anarawd ap Gruffydd of Deheubarth by treachery, apparently on Cadwaladr"s orders. Cadwaladr fled to Ireland where he hired a fleet from Óttar the Norse-Gael king of Dublin and landed at Abermenai in 1144 in an attempt to force Owain to return his lands.
When Henry II invaded Gwynedd in 1157 the terms of the peace agreement between him and Owain Gwynedd included the stipulation that Cadwaladr should be given back his lands.
He was buried alongside Owain in Bangor Cathedral.
