Eochaid mac Domnaill (died 572), also Eochaid Find ("the fair"), was an Irish king who is included in some lists as a High King of Ireland. He was the son of Domnall Ilchelgach (died 566) and grandson of Muirchertach mac Muiredaig (died 534), also considered high kings.[1] He was a member of the Cenél nEógain branch of the northern Uí Néill. He ruled in Ailech from 565 to 571.[2]
The high kingship of Ireland rotated between the Cenél nEógain and Cenél Conaill branches in the late 6th century.[3] Eochaid ruled jointly with his uncle Báetán mac Muirchertaig (died 572) from 569.[4] The middle Irish king lists have misplaced their reign putting it earlier than the annalistic tradition but other king lists have them in the correct order.[5] They are also omitted from the earliest list of Kings of Tara, the Baile Chuind (The Ecstasy of Conn), a late 7th-century Irish poem. It is possible that the Ulaid king, Báetán mac Cairill (died 581), was the actual high king at this time.[6]
In 572 the two kings were defeated and slain by Crónán mac Tigernaig, king of the Cianachta Glenn Geimin in modern County Londonderry.[7]