According to the legend, Echtra Condla, he was not Conn's only son: he had a brother called Connla, who fell in love with a fairy woman, and went with her to Mag Mell, never to be seen again.
[4] In another variant of the myth, Bé Chuille places a geis on Art, after he loses at a game of fidchell; under which he must leave Ireland never to return until he can find and rescue the maiden Delbchaem ("Fair Shape").
[5] Art succeeded to the High Kingship after his brother-in-law Conaire Cóem, was killed by Nemed, son of Sroibcenn, in the battle of Gruitine.
He made an alliance with Benne Brit, son of the king of Britain, raised an army of foreigners, and returned to Ireland.
[7] However, according to Keating, Achtan was Art's official mistress, to whom he paid a dowry of cattle; his wife, and the mother of his other children, was Medb Lethderg.