The night before the three findemna, Bres, Nár and Lothar, made war for the High Kingship against their father in the Battle of Druimm Criaich, their sister Clothru, concerned that her brothers could die without heirs, seduced all three of them, and a son, Lugaid, was conceived.
[6] Certain elements of this story bear a resemblance to the prophecy of Lugh Lamhfhada, son of Ethniu, who was predicted to kill his grandfather Balor of the Evil-Eye.
His wife was Derbforgaill, a daughter of the king of Lochlann (Scandinavia), who had fallen in love with Cúchulainn from afar and come to Ireland with a handmaiden in the form of a pair of swans, linked by a golden chain, to seek him out.
Cúchulainn, at Lugaid's urging, shot a slingstone which hit Derbforgaill, penetrating her womb, and the two women fell on the beach in human form.
Derbforgaill's urine reached the ground, and the other women, out of jealousy, attacked and mutilated her, gouging out her eyes and cutting off her nose, ears, and hair.
[8] Lucius Gwynn suggested that what may have happened is an earlier King of Tara known as Lugaid Réoderg may have become confused with a separate and minor character from the Ulster Cycle associated with Cúchulainn.
[12] The last, usually known simply as Mac Con "Hound's Son", is an Érainn king matching Conaire Mór in importance in Irish legend.