Hywel ab Edwin was king of Deheubarth in south Wales

Wales

Wales is a country that is part of the United Kingdom and the island of Great Britain, bordered by England to its east and the Atlantic Ocean and Irish Sea to its west. It has a population of three million, and a total area of 20,779 km²...

 from 1033.

Hywel was the son of Edwin ab Einion and great-grandson of Hywel Dda

Hywel Dda

Hywel Dda , was the well-thought-of king of Deheubarth in south-west Wales, who eventually came to rule Wales from Prestatyn to Pembroke. As a descendant of Rhodri Mawr, through his father Cadell, Hywel was a member of the Dinefwr branch of the dynasty and is also named Hywel ap Cadell...

. When the previous king, Rhydderch ap Iestyn, who had usurped the throne, died in 1033 Hywel became king of Deheubarth, sharing the realm with his brother Maredudd.

On Maredudd's death in 1035, Hywel became sole king.