Quick Facts
Biography
Brian Oge O'Rourke (Irish: Brian Óg na Samhthach Ó Ruairc) (c. 1568 - 28 January 1604) was the penultimate king of West Bréifne, from 1591 until his overthrow in April 1603, at the end of the Nine Years' War. He succeeded his father, Brian O'Rourke, when news of the latter's execution in London reached Ireland. In 1599, his forces fought alongside those of "Red" Hugh O'Donnell at the Battle of Curlew Pass, during the Nine Years' War. His forces, along with those of Hugh O'Neill, 2nd Earl of Tyrone, were still suffiently menacing to Queen Elizabeth I of England that she was persuaded to agree to a peace in Ireland - the Treaty of Mellifont.
He was the last Irish king to be defeated in the war, roughly a month after the others had surrendered. Brian Óg himself never surrendered, but was ousted by his brother Tadhg, who had defected to the English during the war and with their support invaded his kingdom in March 1603. He fled to Galway where he died of fever in January 1604.
In accordance with his wishes, he was buried in the cloister of the Ross Errilly Friary. He was succeeded by his brother, Tadhg mac Briain na Murtha.