Cognomen Caillat (Caillat 
) , throughout the world, is quite a rare surname. The cognomen Caillat is characteristic of Western Europe, particularly France, where it is quite a rare surname, Switzerland, and Belgium, where it is a very rare surname. In absolute terms, it is the most numerous in France, Switzerland, and the United States. Very seldom, Caillat is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Caillat | Germany, Switzerland, United States, Argentina, France |
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apollon caillat FR (b. 1857) |
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| henri caillat FR (b. 1829) |
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| paul caillat French politician (1874-1947), FR (b. 1874) |
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ken caillat American record producer, recording engineer, US (b. 1946) |
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| louis caillat French architect (1901-2002), FR (b. 1901) |
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dominique caillat writer, CH (b. 1956) |
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| colette caillat French professor of Sanskrit and comparative grammar (1921–2007), FR (b. 1921) |
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christian caillat French handball player, FR (b. 1974) |
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| stéphane caillat French musician (1928-2020), FR (b. 1928) |
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isabelle caillat Swiss actress, CH (b. 1978) |
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colbie caillat American singer-songwriter, US (b. 1985) |
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| gérard caillat FR (b. 1927) |
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| philippe caillat French guitarist and music educator, FR (b. 1948) |
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| gérard caillat French historian (b. 1949) |
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| michel caillat French sociologist, FR (b. 1951) |
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Mr, Ruth, Dany, Davy, Greg, Lise, Jose, Joel, Jojo, Jean, Nico, Nora, Eric, Evan, Frã, Olga, Omar, Will, Yann, Yves, Yvon, Yvan, Rene, Paul, Axel, Adam, Ms, As, Jm, Seb, Sã, Cã, Gui, Guy, Gã, Hã, Maria, Vã, Marc, Mary, Maud, Maë, Suzy, Seth, Stã, Alex, Alix, Anne, Yan, and Marie