Cadwallon ab Ieuaf
Encyclopedia
Cadwallon ap Ieuaf was a King of Gwynedd
Kingdom of Gwynedd
Gwynedd was one petty kingdom of several Welsh successor states which emerged in 5th-century post-Roman Britain in the Early Middle Ages, and later evolved into a principality during the High Middle Ages. It was based on the former Brythonic tribal lands of the Ordovices, Gangani, and the...

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Cadwallon was the son of Ieuaf ab Idwal
Ieuaf ab Idwal
Ieuaf ap Idwal was a king of part of Gwynedd and possibly part of Powys .Ieuaf was the son of Idwal Foel...

 and succeeded to the throne of Gwynedd on the death of his brother Hywel ab Ieuaf
Hywel ab Ieuaf
Hywel ap Ieuaf was a King of Gwynedd in north-west Wales from 979 to 985.Hywel was the son of Ieuaf ap Idwal who had ruled Gwynedd jointly with his brother Iago ab Idwal until 969. In that year the sons of Idwal quarrelled and Iago took Ieuaf prisoner...

 in 985. He only reigned for a year, for in 986 Maredudd ab Owain
Maredudd ab Owain
Maredudd ab Owain was a King of Deheubarth, and through conquest also of Gwynedd and Powys, kingdoms in medieval Wales.Maredudd was the son of Owain ap Hywel and the grandson of Hywel Dda. His father was king of Deheubarth before him. As Owain grew too old to lead in battle his son Maredudd took...

 of Deheubarth invaded Gwynedd, slew Cadwallon and annexed his kingdom.
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