Domnall ua Néill

Domnall ua Néill (c. 920–980) was High King of Ireland from 956. A grandson of Niall Glúndub of the northern Uí Néill, he became king of Ailech on his father's death in 943 and took the high kingship in 956.

A ruler credited with military reforms later associated with Brian Boru, he long warred against Amlaíb Cuarán, the Norse king of Dublin. In 980 he abdicated into Armagh monastery, where he died soon after, the last of his line to hold the high kingship.