Irish Chiefs and Clans in Monaghan - Irish Pedigrees

That part of the kingdom of Orgiall called Monaghan was overrun by the forces of John de Courcy, in the reign of King John, but the MacMahons maintained their national independence to the reign of Elizabeth; when Monaghan was formed into a county, and so called from its chief town Muineachan, which signifies the "Town of the Monks."

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