Cognomen Mckoy (マッコイ 
, Mckoy 
, מקקוי 
) , across the world, is a common family name. The surname Mckoy is characteristic of Latin America and the Caribbean, particularly Belize, where it is quite a common surname, Saint Kitts and Nevis, and Jamaica. Not in comparison with a country's population, it most frequently occurs in the United States, Jamaica, and the United Kingdom. Much less frequently, Mckoy is the forename as well as the last name.
| VARIANT | COUNTRY |
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| マッコイ | Japan |
| Mckoy | Belize, Canada, Jamaica, United States, United Kingdom |
| מקקוי | Israel |
| jane mckoy IN (b. 1774) |
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| allmand a. mckoy American politician (1825-1885), US (b. 1825) |
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| christine mckoy American conjoined twin (b. 1851) |
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| william berry mckoy lawyer and political leader of Wilmington, North Carolina, US (b. 1852) |
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| henry bacon mckoy lawyer of Wilmington, North Carolina, US (b. 1893) |
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| david mckoy (b. 1929) |
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| neville mckoy Jamaican cricketer, JM (b. 1946) |
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| grainger mckoy sculptor (b. 1947) |
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| bill mckoy American football linebacker, US (b. 1948) |
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| noel mckoy British singer, GB (b. 1950) |
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| derrick mckoy attorney General of Jamaica (b. 1951) |
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| wayne mckoy American basketball player, US (b. 1958) |
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| mark anthony mckoy Austrian runner, AT (b. 1961) |
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| olivia mckoy athletics competitor, JM (b. 1973) |
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| katherine sharon mckoy (born 1974) (b. 1974) |
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