Surname Cailleaux (Cailleaux 
) , all around the world, is quite a rare last name. The surname Cailleaux is habitual in Western Europe, particularly France, where it is quite a rare surname, Belgium, and Switzerland, where it is a very rare surname. Measured by absolute frequency, this name is the most popular in France, Belgium, and Brazil. Very seldom, Cailleaux is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Cailleaux | Belgium, Canada, Brazil, Poland, France |
| carlos maria vergara y cailleaux Spanish politician, ES (b. 1854) |
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| denis cailleaux French historian, FR (b. 1957) |
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| éric cailleaux French handball player, FR (b. 1959) |
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| christian cailleaux FR (b. 1967) |
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Mr, Elba, Elza, Edir, Eddy, Edna, Eric, Enzo, Fred, Igor, Yann, Yves, Ygor, Maria, Marie, Manon, Sarah, Simon, Sonia, Alice, Aline, Alain, Tony, Jean, Joel, Joao, Ms, Sã, Ana, Cã, Lea, Noa, Manu, Stã, Alan, Anne, Andre, Axel, Rene, Rick, Rita, Rudy, Ryan, Dany, Dora, Gael, Lucy, Luan, Paul, and Anais