Within the UK and Ireland, the surname Macarthur most frequently occurs in Scotland where it is carried by 1 in every 4,279 people. The majority of those with the family name of Macarthur are to be found living in/around Outer Hebrides (approx. 9% of all UK Macarthur's), Highland and Argyll and Bute. The name can also be found in England with 1 in 52,416 people using it, and Ireland with 1 in 58,193.
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