Surname Macarthy (Macarthy 
) , in the entire world, is quite a rare last name. The surname Macarthy is characteristic of Sierra Leone, where it is quite a common surname, Ghana, where it is a rare surname, and Ireland. Measured by absolute frequency, this name is the most popular in Sierra Leone, the United States, and Nigeria. Very seldom, Macarthy is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Macarthy | Nigeria, Sierra Leone, United Kingdom, Ghana, United States |
| justin macarthy 1770 - (b. 1770) |
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| thomas francis macarthy (b. 1802) |
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| thomas george macarthy Brewer, benefactor, NZ (b. 1833) |
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cornelius macarthy actor |
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| j. macarthy American artist, active 1801 |
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| dermod macarthy Peerage person ID=299592 |
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| thomas macarthy New Zealand brewer |
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