Connacht or Connaught both: kŏn´ôt, kənôt´ [key], province (1991 pop. 423,031), 6,611 sq mi (17,122 km), W Republic of Ireland, comprising the counties of Mayo , Sligo , Leitrim , Roscommon , and Galway . It was one of the ancient kingdoms of Ireland, whose rulers, the O'Connors, were supplanted by the Anglo-Norman De Burghs in the 13th cent.

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