Congalach Cnogba
Congalach Cnogba (died 956), also called Congalach mac Máel Mithig, was a king of Brega of the Síl nÁedo Sláine and high king of Ireland from about 944. He was a grandson of Flann Sinna and sister's son of his predecessor Donnchad Donn.
The annals show him warring with most neighbours, now allying with, now fighting Amlaíb Cuarán, Norse king of Dublin. In 956 he was killed in an ambush at Dún Ailinne, County Kildare, fighting the Leinstermen and the Norse of Dublin.