There are two Irish names from which the Moran surname has been anglicised. The first is Ó Mórain which means big and the second is Ó Mughráin. The first variation arose in County Mayo near the modern town of Ballina where the Morans held power. The other variation came from a family who were part of the Uí Máine tribal grouping. Two branches of the that family were based around Criffon in County Gallway, and the modern village of Ballintober in north Roscommon. The vast majority of O'Mórains are of Connacht origin. Variation: Morán

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