Murtogh O’Brien-Arra

Murtogh O'Brien (born c.1545) was an Anglican bishop of Killaloe, in County Clare, Ireland.

He was a 17th generation descendant of Brian Boru, in the branch of the clan O'Brien known as O'Brien-Arra, from County Tipperary. His seat was St. Flannan's Cathedral in Killaloe, which was actually built by his 10-Great Grandfather, Donnell Mor Ó Briain, King of Munster, in the later 12th century. It is named for Saint Flannan Uí Thoirdhealbhaigh, son of Toirdhealbhach Uí Bloid, a direct ancestor of Bishop O'Brien.

Murtogh was born to Roman Catholic parents, Turlogh Ó Briain and Máire Ó Cearbhaill. He was educated in England at Magdalene College, Cambridge, and became an Anglican priest. On May 15, 1570, he was appointed Protestant Bishop of Killaloe by Elizabeth I; however, he was not conescrated until six years later.

Even before his appointment, because of his family's position of power in the kingdom of Thomond, O'Brien received all of the profits from that see. O'Brien ruled his diocese for 36 years before voluntarily retiring in 1612. He married Slaney O'Brien, of Clan O'Brien, Inchiquin branch. She was the daughter of Murrough O'Brien, Baron of Inchiquin. They were known to have two sons; Turlogh O'Brien and John O'Brien. O'Brien died on April 30, 1613 in Killaloe.

Genealogy of Murtogh O'Brien and O'Brien-Arra

Brian Bóruma mac Cennétig Uí Thoirdhealbhaigh, High King of Ireland

Teige Ó Briain, King of Munster

Toirrdelbach Ó Briain, High King of Ireland

Diarmait Ó Briain, King of Munster

Toirrdelbach Ó Briain, King of Munster

Donnell Mor Ó Briain, King of Munster (built St. Flannan's Cathedral)

Donough Cairbreach Ó Briain, King of Thomond

Conor Na Siudaine Ó Briain, King of Thomond

Brian Roe Ó Briain

Donald Ó Briain

Brian Bane Ó Briain

Morrogh na Raithnidha Ó Briain

Torlogh Ó Briain

Teige Ó Briain

Donaldmore Ó Briain

Mortogh Cacch Ó Briain

Turlogh Ó Briain=Máire Ó Cearbhaill

Bishop Murtogh O'Brien of Killaloe=Slaney O'Brien

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John O'Brien Turlogh O'Brien