Cognomen Clanchy (Clanchy 
) , throughout the world, is a rare surname. The surname Clanchy is habitual in Australia, where it is a rare surname, the United Kingdom, where it is a very rare surname, and Canada, where it is an extremely rare surname. In absolute terms, the name is most common in Australia, the United Kingdom, and China. Likewise, Clanchy is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Clanchy | Australia, China, Canada, Democratic Republic of the Congo, United Kingdom |
| michael clanchy British historian, GB (b. 1936) |
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| john clanchy AU (b. 1943) |
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| kate clanchy British writer, GB (b. 1965) |
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| kelly m clanchy researcher (ORCID 0000-0001-9249-1801) |
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| mary clanchy Peerage person ID=312245 |
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| arthur french clanchy Peerage person ID=270709 |
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| eva maude clanchy (died 1973) |
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| joan clanchy British school head, GB |
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