Cognomen Caillet (Caillet 
) , in the entire world, is quite a common last name. The surname Caillet is characteristic of France, where it is quite a common surname, Switzerland, where it is quite a rare surname, and the Democratic Republic of the Congo. Not in comparison with a country's population, it most frequently occurs in France, the Democratic Republic of the Congo, and Argentina. Much less frequently, Caillet is the forename as well as the last name.
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| Caillet | Switzerland, France, Democratic Republic of the Congo, United States, Argentina |
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guillaume caillet French rebel leader, FR (b. 1310) |
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| bénigne caillet 1644 - 1714 (b. 1644) |
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| jean-jacques caillet FR (b. 1743) |
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| francisco caillet (b. 1775) |
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| jules caillet (b. 1825) |
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| louis e. caillet (b. 1832) |
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| albert louis caillet born 1869; died 1922 (b. 1869) |
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| louis caillet French librarian and historian (b. 1881) |
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| paul étienne frédéric caillet French official (1881-1960), FR (b. 1881) |
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| robert caillet (b. 1882) |
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| robert caillet (1896-1948), CH (b. 1896) |
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| andré caillet French association football player (1902-1925), FR (b. 1902) |
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| pierre caillet French archivist and historian, FR (b. 1903) |
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| francis marcel caillet French politician, FR (b. 1910) |
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| maurice caillet French librarian, FR (b. 1910) |
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