Óengus mac Mugróin

Óengus mac Mugróin (died 803) was a king of the Uí Failge, a Laigin people of County Offaly. He was the son of Mugrón mac Flainn (died 782), a previous king.[1] He ruled from 783 to 803.[2]

A conflict within the Uí Failge led to a slaughter in 789 at Cluain Ferta Mongáin (Kilclonfert, County Offaly) by Óengus at which his cousin Áed mac Tomaltaig was slain (their fathers were brothers).[3] In 803 he was treacherously killed by the followers of Fínsnechta Cethardec mac Cellaig (died 808), over king of Leinster.[4] Finsnechta was ensuring his control of the church of Kildare which led to conflict with the Uí Failge.

His grandson Máel Sinchill mac Mugróin (died 881) was a King of the Uí Failge.

Notes
  1. Mac Niocaill, pg.127
  2. in the Book of Leinster king list he is only given a reign of 3 years.
  3. Annals of Ulster, AU 789.10; Donnchad Ó Corráin, New History of Ireland: Volume I, pg.601
  4. AU 803.6; Byrne, pg.160
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See also
  • Kings of Ui Failghe

References
  • Annals of Ulster at at University College Cork
  • Byrne, Francis John (2001), Irish Kings and High-Kings, Dublin: Four Courts Press, ISBN 978-1-85182-196-9
  • Mac Niocaill, Gearoid (1972), Ireland before the Vikings, Dublin: Gill and Macmillan
  • Ó Cróinín, Dáibhí (2005), A New History of Ireland, Volume One, Oxford: Oxford University Press
  • Book of Leinster,Rig hua Falge at at University College Cork
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