Il regno di Bréifne (anche "Breffny", "Brefnie", "Brenny") era il tradizionale territorio del gruppo tribale degli Uí Briúin Bréifne. ###>The Kingdom of Breifne or Bréifne (anglicized "Breffny", "Brefnie" or "Brenny") was the traditional territory for an early Irish tribal group known as the Uí Briúin Bréifne.