Cadwallon ap Ieuaf (died 986) was a King of

Gwynedd Gwynedd (; ) is a county and preserved county (latter with differing boundaries; includes the Isle of Anglesey) in the north-west of Wales. It shares borders with Powys, Conwy County Borough, Denbighshire, Anglesey over the Menai Strait, and C ...

. Cadwallon was the son of

Ieuaf ab Idwal Idwal ab Idwal ( en , Idwal son of Idwal, died 988), usually known as Ieuaf ( cy, Junior) to distinguish him from his father Idwal Foel, was joint king of Gwynedd in northern Wales from 950 to 969. He possibly also ruled Powys for some time. Ieua ...

and succeeded to the throne of Gwynedd on the death of his brother

Hywel ab Ieuaf Hywel ap Ieuaf (died 985) 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 ...

in 985. He only reigned for a year, for in 986

Maredudd ab Owain Maredudd ab Owain (died ) was a 10th-century king in Wales of the High Middle Ages. A member of the House of Dinefwr, his patrimony was the kingdom of Deheubarth comprising the southern realms of Dyfed, Ceredigion, and Brycheiniog. Upon the d ...

Deheubarth Deheubarth (; lit. "Right-hand Part", thus "the South") was a regional name for the realms of south Wales, particularly as opposed to Gwynedd (Latin: ''Venedotia''). It is now used as a shorthand for the various realms united under the House of ...

invaded Gwynedd, slew Cadwallon and annexed his kingdom.

References

* Cadwallon ab Ieuaf, Prince of Gwynedd Monarchs of Gwynedd 10th-century Welsh monarchs Year of birth unknown {{Wales-bio-stub