Domnall ua Néill
Domhnall ua Néill (old spelling: Domnall ua Néill; anglicised as Donal O'Neill) (died 980) was High King of Ireland from 956 to 980.
Domnall was the son of Muirchertach mac Néill, and grandson of Niall Glúndub, a member of the Cenél nEógain northern Uí Néill. He became co-King of Ailech with his brother Flaithbertach on the death of his father in 943. He became High King of Ireland on the death of his maternal cousin Congalach Cnogba of the southern Uí Néill sept of the Síl nÁedo Sláine.
Domnall is considered to have been an effective ruler who introduced military reforms later credited to Brian Boru. Much of his reign was spent in war against his sister Dúnflaith's husband Amlaíb Cuarán, the King of Dublin. In 980 he abdicated and entered the monastery Armagh where he died shortly afterwards.
Domnall's children included Muiredach, whose son Lochlann may have been the ancestor of Domnall Ua Lochlainn, and Muirchertach, ancestor of the O'Neills of Tír Eógain. His grandson Flaithbertach Ua Néill was King of Ailech and the leading figure among the Uí Néill, certainly from the death of Máel Sechnaill in 1022, if not earlier.
- Byrne, Francis John (1973), Irish Kings and High-Kings, London: Batsford, ISBN 978-0-7134-5882-4
- Downham, Clare (2007), Viking Kings of Britain and Ireland: The Dynasty of Ívarr to A.D. 1014, Edinburgh: Dunedin, ISBN 978-1-903765-89-0
- Hudson, Benjamin (2005), Viking Pirates and Christian Princes: Dynasty, Religion, and Empire in the North Atlantic, New York: Oxford University Press, ISBN 978-0-19-516237-0
- Hudson, Benjamin T. (2004), "Domnall ua Néill (Domnall of Armagh) (d. 980)", Oxford Dictionary of National Biography, Oxford: Oxford University Press, retrieved 2007-10-27
- Woolf, Alex (2007), From Pictland to Alba, 789–1070, The New Edinburgh History of Scotland, Edinburgh: Edinburgh University Press, ISBN 978-0-7486-1234-5
Domnall ua Néill
Muirchertach mac Néill
|King of Ailech
with Flaithbertach mac Muirchertaig meic Néill (943–949)
Flaithbertach mac Conchobair, Tadg mac Conchobair and Conn mac Conchobair (956–962)
Murchad Glun re Lar mac Flaithbertaigh (962–972)
Fergal mac Domnaill meic Conaing
|High King of Ireland
Máel Sechnaill mac Domnaill
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