 Cú-cen-máthair died in 665 of a plague which killed many others as recorded in the Irish annals.The king lists have him followed as King of Munster by Colgú mac Faílbe Flaind of the Eóganacht Chaisil.Cú-cen-máthair left at least two sons, Finguine mac Cathail (died 696) and Ailill mac Cathail (died 701), both of whom are listed as Kings of Munster in the annals.