Idwal Foel or Idwal ab Anarawd was a 10th-century King of Gwynedd in Wales.
Background
A member of the House of Aberffraw, he inherited the throne from his father, Anarawd ap Rhodri. William of Malmesbury credited him as "King of the Britons" in the manner of his father. Idwal inherited the throne of Gwynedd on the death of his father Anarawd around 916.
Career
He allied himself with Æthelstan of England upon the latter"s accession in 924. As Æthelstan was ambitious to establish his authority across Britain, Idwal honoured him by visiting the English court in 927, 928, and 937. On the first of these visits, he signed charters agreeing to campaign with Æthelstan against the Scots, and marched with Hywel Dda of Deheubarth and Morgan ab Owain of Gwent against Eógan I of Strathclyde that year.
Eógan was forced to submit to the English king and appear at court by Christmas.
Æthelstan died in 939 and was succeeded by his half-brother Edmund. The throne of Gwynedd should have passed to Idwal"s sons and Ieuaf, but Hywel invaded and drove them from the kingdom.
He reigned for eight years before they were able to return and reclaim their patrimony.