Overview
Owain ap Hywel (died ) was king of Deheubarth in south Wales and probably also controlled Powys.
Owain was one of the three sons of King Hywel the Good. Upon Hywel's death in 948, Owain, Rhodri, and Edwin divided his lands among themselves according to Welsh law. The sons were not able to retain Hywel's hegemony over Gwynedd, which was reclaimed for its earlier dynasty by the sons of Idwal Foel.
In 950, two of the sons of Idwal Foel, Iago and Ieuaf, invaded the south, penetrating as far as Dyfed. The sons of Hywel retaliated by invading the north in 954, reaching as far north as the Conwy valley before being defeated at Llanrwst and being obliged to retreat to Ceredigion.
Rhodri died in 953 and Edwin in 954, leaving Owain in sole possession of Deheubarth alone.
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