 Fir Luirg survives in the present-day name of the barony of Lurg, County Fermanagh.The Uí Briúin Bréifne, or O'Brien Breffny, are a branch of the Uí Briúin kin-group.The Uí Briúin descend from Brion, son of Eochaid Mugmedon and Mongfind, and was an elder half brother of Niall of the Nine Hostages.