Aed Bennán (Aoḋ Beannán), power of, 237 Agricola conquers the Britons, 36; intends the conquest of Ireland, 136 Ailbhe, Saint, date of, 161 Ailech (Oileaċ), kingdom of, 184; growth in power, 277 airchinnech (oirċinneaċ, "erenagh," "herenagh"), office of, 351 airecht (oireaċt), court of assembly, 320 Airgialla (Oirġialla, "Oriel"), 126; varying extent of, 185, 278 Aithech-thuatha, 148 Amorgen (Aṁairġean, Aiṁirgean), legend of, 97 Anglo-Norman aggression, false pretext of, 286 Anglo-Norman conquest, failure of, 323; supposed causes of failure, 324; extent of, 327; rally begins against, 328; details of rally, 335 Anglo-Norman invasion, destructive effects of, 308-311 Anglo-Normans, Irish assimilation of, 341 Annals, restricted scope of the, 178 Aristocracy, intense pride of, 354 Armagh founded, 160; school of, a national university, 284 Assemblies, 138, 320; of the learned, 344 Atecotti, 144, 146, 147-149 B Bede describes Ireland, 195; relates Irish migration to Scotland, 195, 196 Belach Mugna (Bealaċ Muġna "Ballaghmoon"), battle of, 260 Belgae, origin of, 18; "Brythons," a supposed branch of, 42 Belgic migrations, 52; extended to Ireland, 57 Bernard, Saint, of Clairvaux, his interest in Ireland, 281 Black Pig's Dyke, 131 "Book of Invasions," a national epic, 96 "Book of Rights," contents of, 274 Bóramha tribute, 238 Brega (Breaġa, "Bregia"), kingdom of, 235 Bregon (Breoġan), legend of, 93 Brian Bóramha, birth of, 266; his allies, 268; his policy, 269-272 Britain, Irish invasion of, 141; Irish settlements in, 155 British ethnography exemplified, 32 Britons, effect of Roman conquest on, 34-37; displaced from Scotland, 202; in Irish wars, 203 Brittani, Brittania, origin of the names, 58 Bronze Age in Ireland, date of, 43; not Celtic, 44-46, 70; tillage in Ireland during, 72 Brown Earl of Ulster, 339 Bruce, Edward, chosen king of Ireland, 334; comes to Ireland, 337 Bruce, Robert, sovereignty of Ireland offered to, 333, 337 "Brythons," 34, 43, 45 C