Sadb ingen Chuinn was a daughter of
Conn of the Hundred Battles, a
High King of Ireland. She married firstly Macnia mac Lugdach, prince of the
Dáirine or
Corcu Loígde, and was mother of
Lugaid Mac Con, High King of Ireland. Upon the death of Macnia, she married secondly
Ailill Aulom, king of southern Ireland, and was mother of
Éogan Mór, ancestor of the
Eóganachta. Her brother was
Art mac Cuinn, also a High King of Ireland, while her sister Sáruit married
Conaire Cóem of the
Érainn, who was High King before him.