Mourne (barony)
Mourne (named after the Múrna) is a barony in County Down, Northern Ireland. It lies in the south-east of the county, with the Irish Sea to its east. It is bordered by two other baronies: Iveagh Upper, Lower Half and Iveagh Upper, Upper Half to the north and west. Mourne gets its name from the Múrna (Old Irish: Mughdorna), a people who hail originally from a territory of the same name in modern County Monaghan.
Ancient history
The Múrna
The Múrna are described as being a powerful people in the "archaic" period and possibly either being a pre-Celtic or very early Celtic people who may have been rulers of Ulster before the ascendancy of the Ulaid. Early genealogists would claim that they descend from Mughdhorn Dubh, a son of Colla Menn, however this has been rebuked as a figment of imagination and as politically fashionable at the time. Indeed Mighdorna is listed as being one of the territories conquered from the Ulaidh by the Three Collas with Colla Menn taking possession of Mughdorna. The O'Hanratties are stated as having anciently possessed this territory.