Breagha, nom. pl., gpl. Breagh, it has no sing, form, cf., Connachta, Ulaidh, etc. (sometimes rendered Breagh in Trans.); a plain (and its people) in.East Meath, Latinised Bregia, and extending, according to Mageoghegan (Annals of Clon. anno 778), from Dublin to Bealach Breck, west of Kells, and from the Hill of Howth to Sliabh Fuaid; the ancient limits of the plain are not exactly defined; it contained Ath Truim (Trim) and Eadar (Howth); Ath Cliath (Dublin) was outside of but closeto it. It seems to have reached as far as the Boyne and Cassan, i.e., Annagassan to the south-east of Castlebellingham. It is often called Breaghmhagh and Magh Breagh; Breagha also means the people of Breagha or Bregia. The men of Breagha as far as Casan, I. 114; contains 5 triochas, ib.; Loch Laighlinne in Ui Mac Uais (q.v.) in, 164; Magh Muirtheimhne in, 178; Loch an Chuighidh in, II. 214; Loch Gabhair in Meath and in, 122; Dealbhna Beag of, 296; Dubhros on the Boyne in, 306; Maoilmithidh, k. of, III. 216; Brian Boraimhe called poetically Brian Breagh, 'Brian of Breagha,' 262; death of Brian in (at Cluain Tarbh), 276; Mathghamhain O Riagain, k. of, captures Amhlaoibh, 290.
Breagha, s. of Breoghan, II. 40 (Breogha); comes to Ire. with sons of Milidh, 70; Magh Breagh named from, 80.
Breagha, s. of Seanbhoth, first established single combat in Ire., I. 172.
Foras Feasa Ar Éirinn: The History of Ireland, by Geoffrey Keating D.D. Part IV, containing the Genealogies, Synchronisms with an Index, which includes the elucidation of place names and annotations to the text of Vols. I, II and III.
Editor: Patrick S. Dinneen.