Cognomen Mcclafferty (Mcclafferty 
) , globally, is quite a rare surname. The cognomen Mcclafferty is characteristic of Ireland, where it is quite a rare surname, the United Kingdom, where it is a rare surname, and Australia. Not in comparison with a country's population, it is the most numerous in the United States, the United Kingdom, and Ireland.
| VARIANT | COUNTRY |
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| Mcclafferty | Canada, Australia, United States, United Kingdom, Ireland |
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mark mcclafferty Television producer, writer, US (b. 1901) |
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| catherine mcclafferty (1898-2000) (b. 1898) |
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| carla killough mcclafferty Children's author (b. 1958) |
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| edith mcclafferty Member of the Montana House of Representatives, US (b. 1960) |
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| enda mcclafferty Irish journalist (b. 1970) |
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| brendan mcclafferty researcher |
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| hilary mcclafferty researcher |
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| siobhan mcclafferty |
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