Within the UK and Ireland, the surname Moriarty most frequently occurs in Ireland where it is carried by 1 in every 1,406 people. The majority of those with the family name of Moriarty are to be found living in/around Munster, Leinster and, to a lesser extent, Connaught. The name can also be found in England with 1 in 22,312 people using it.
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