The Uí Briúin is a historical dynasty in Ireland, primarily associated with the province of Connacht. This lineage emerged from Brian Boru, a notable king who played a significant role in Irish history during the 11th century. The Uí Briúin were known for their influence and power, particularly in the regions of Galway and Roscommon. The dynasty is divided into several branches, including the Uí Briúin Seóla and the Uí Briúin Ai. They were significant in the political landscape of medieval Ireland, often engaging in alliances and conflicts with other clans. The Uí Briúin's legacy continues to be recognized in Irish history and culture.