Toirdhealbhach ua Briain, anglicised Turlough O'Brien, was King of Munster and effectively High King of Ireland. A grandson of Brian Bóruma, Toirdelbach was the son of Tadc mac Briain who was killed in 1023 by his half-brother Donnchad mac Briain.
- Occupation
- monarch
- Position held
- King of Munster
- Born
- 1009
- Died
- July 14, 1086
