Cú_Chulainn Cú Chulainn (Irish "Hound of Culann, "; also spelled Cú Chulaind, Cúchulainn, Cúchulain, Cuchullain) is an Irish mythological hero who appears in the stories of the Ulster Cycle, as well as in Scottish and Manx folklore. The son of the god Lugh and Deichtine, sister of the king of Ulster, he was originally named Sétanta