(Irish mythology) A king of Munster and a sorcerer who can transform at will. He was killed by Cúchulainn, but his death was avenged by his son Lugaid mac Con Roí, who was subsequently killed by Conall the Victorious.
The name Cú Roí probably means "hound of the battlefield."
English Wiktionary. Available under CC-BY-SA license.