Muirchertach Ua Briain

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Muirchertach Ua Briain
King of Munster and High King of Ireland
Fanciful depiction of Muirchertach.
Reign	c.1075-1086
Predecessor	Toirdelbach Ua Briain
Successor	Tairrdelbach Ua Conchobair
Born	c. 1050
Died	1119
Issue	Mathgamain Domnall Bjaðmunjo Lafracoth
House	Uí Briain
Father	Toirdelbach Ua Briain
Mother	Derbforgaill, daughter of Tadhg Mac Giolla Pádraig of Osraige

Muircheartach Ua Briain (anglicised as Murtaugh O'Brien; c. 1050 – c. 10 March 1119), son of Toirdelbach Ua Briain and great-grandson of Brian Boru, was King of Munster and later self-declared High King of Ireland.