Huail appears in a number of Arthurian legends from the Middle Ages.

An early account of a conflict between Huail and King Arthur, written in the early twelfth century, has Arthur is wounded in the thigh in a fight with Huail on the Isle of Man (Island of Minau).

Another version is in Elis Gruffudd's chronicle, dated around 1530. Huail, attempts to seduce one of Arthur's mistresses. Arthur finds out, and has a fight with Huail. Huail is the victor, having wounded Arthur in the knee. The wound leaves King Arthur with a limp, and Arthur decreed that if Huail ever spoke of beating him in combat, Huail would be beheaded..

Later Arthur is said to have fallen in love with a woman in the town of Ruthin, and disguised himself as a woman to visit her. Huail was dancing there, and recognized the lame king. Huail mocked the king by saying to the ladies"This dancing were all right if it were not for the knee". Arthur overheard this and, ordered Huail to be beheaded on the stone that can be found in Ruthin today.

Characters from King Arthur's legends