Áed Findliath

Áed Findliath, the fair-grey (died 20 November 879), son of Niall Caille, was king of Ailech and became high king of Ireland in 862. He defeated the Norse at Glenn Foichle in 856 and burned their northern longphorts while Amlaíb and Auisle campaigned in Scotland.

In 868 he routed the men of Brega, Leinster and the foreigners at Cell Ua nDaigri, where Flann of Brega fell. He invaded Leinster in 870 and 874, died at Druim Inasclainn in 879, and left a son Niall Glúndub, ancestor of the O'Neills.