Last name Billaut (Billaut 
) , around the globe, is quite a rare cognomen. The last name Billaut is habitual in France, where it is quite a rare surname, Portugal, where it is a very rare surname, and Spain, where it is an extremely rare surname. Measured by absolute frequency, it is commonest in France, the United States, and Portugal. Much less frequently, Billaut is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Billaut | Brazil, Spain, Portugal, United States, France |
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adam billaut French poet, carpenter, FR (b. 1602) |
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| jean-michel billaut FR (b. 1945) |
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| jean-louis billaut French politician, FR (b. 1962) |
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| hervé billaut French pianist, FR (b. 1964) |
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| françois billaut researcher and university professor, FR (b. 1978) |
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| gaëlle billaut-danno French actress, FR |
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| jean-charles billaut computer scientist |
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| julien billaut French canoeist, FR (b. 1981) |
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| manon billaut |
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Mr, Sonia, Stacy, Aline, Alain, Andre, Anais, Agnes, Cindy, Cyril, Boris, Brian, Bruno, Bruce, Katia, Robin, Roger, Rémi, David, Laure, Louis, Lucie, Serge, Sarah, Manon, Marie, Ms, Al, Guy, Gã, J-P, Marc, Anne, Adam, Paul, Rene, Lucas, Rudy, Lisa, Joel, Jean, Nina, Eric, Emma, Eula, Fred, Frã, Igor, Ryan, and Lydie