Tadhg mac Murchadh Ó Briain (anglicised Teige Mac Murrough O’Brien), died 1577, was an Irish soldier and official who served as the first sheriff of Thomond between 1570 and 1571.Thomas Johnson Westropp. Notes on the Sheriffs of County Clare, 1570-1700, Retrieved 12 October 2009

Ó Briain played an active political and military role during the Tudor reconquest of Ireland. He was a son of Murrough O'Brien, 1st Earl of Thomond and Eleanor fitz John. Ó Briain had four children:Person Page - 3845, thePeerage.com Retrieved 12 October 2009 Honora Ní Briain Toirdhealbhach Ó Briain Slany Ní Brien Amy Ní Brien

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