Hywel the Great

King Hoel (,  "Hoel the Great"; ), also known as Sir Howel, Saint Hywel and Hywel the Great, was a late 5th- and early 6th-century member of the ruling dynasty of Cornouaille. He may have ruled Cornouaille jointly after the restoration of his father, Budic II of Brittany, but he seems to have predeceased his father and left his young son, Tewdwr, as Budic's heir.

Hywel appears in Welsh mythology and the Matter of Britain as a "king of Brittany." A relative of Arthur, he was one of his most loyal allies (or, sometimes, a Knight of the Round Table) and was said to have helped him conquer "Gaul" (northern France). Provided by Wikipedia