Aided Chrimthaind maic Fhidaig ocus Trí mac Echach Muigmedóin
A Middle Irish prosimetric saga about the infighting between the sons of Eochaid Mugmedón in their struggle for dominance, the roles of Mongfhind (mother of four of them) and her brother Crimthann in this conflict, and the fates of Brían, Fíachra, Ailill and their sons.