Cognomen Mcwhirter (Mcwhirter 
) , all over the world, is quite a common last name. The family name Mcwhirter is habitual in Australia, where it is quite a rare surname, New Zealand, and the United Kingdom. In absolute terms, it is commonest in the United States, the United Kingdom, and Australia.
| VARIANT | COUNTRY |
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| Mcwhirter | Canada, United Kingdom, Australia, United States, New Zealand |
Macwhirter, Mcwherter, and Mcwhorter
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felix tony mcwhirter American banker, US (b. 1853) |
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| martha mcwhirter American commune founder, US (b. 1827) |
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felix m. mcwhirter (b. 1886) |
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| james mcwhirter Australian businessman (b. 1848) |
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| william mcwhirter British engineer, GB (b. 1851) |
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| a. mcwhirter English footballer (1872-1932), GB (b. 1872) |
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| douglas mcwhirter English football player (1886-1966), GB (b. 1886) |
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george mcwhirter Canadian poet, CA (b. 1939) |
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| louise mcwhirter Financial astrologer (b. 1896) |
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| robert mcwhirter McWhirter, Robert (1904–1994), medical radiologist (b. 1904) |
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| ishbel mcwhirter (b. 1927) |
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| julie mcwhirter American actress, US (b. 1947) |
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| j. jeffries mcwhirter (b. 1938) |
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| alastair mcwhirter British Chief Constable, GB (b. 1953) |
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| norrie mcwhirter Scottish footballer (born 1969), GB (b. 1969) |
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