Last name Barnaud (Barnaud 
) , throughout the world, is quite a rare cognomen. The cognomen Barnaud is habitual in France, where it is quite a rare surname, Singapore, where it is a rare surname, and Switzerland, where it is a very rare surname. In absolute terms, it is commonest in France, the United States, and Singapore. Much less frequently, Barnaud is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Barnaud | Switzerland, United States, Singapore, France, Colombia |
| nicolas barnaud French alchemist, FR (b. 1538) |
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jacques barnaud businessperson (1893-1962), FR (b. 1893) |
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| léon barnaud French naval officer, FR (b. 1845) |
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| jean barnaud (b. 1873) |
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| pierre barnaud FR (b. 1891) |
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| geneviève barnaud French teacher (1913-2003), FR (b. 1913) |
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| édith barnaud (b. 1909) |
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| jean-marie barnaud French writer, FR (b. 1937) |
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| dominique barnaud FR (b. 1931) |
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| françois barnaud French politician, FR (b. 1949) |
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| jean-pierre barnaud French politician, FR (b. 1960) |
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| adeline barnaud researcher |
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| marie-lou barnaud researcher (ORCID 0000-0003-0123-6915) |
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| pierre barnaud |
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Mr, Andre, Anael, Clara, David, Laura, Loïc, Lucie, Jules, Henri, Éric, Martin, Marcel, Magali, Maxime, Michel, Michã, Sophie, Alicia, Albert, Amicie, Amelie, Alain, Adrien, Sonia, Manon, Ms, Guy, Gã, Luc, Marc, Mary, Alix, Andy, Anne, Aude, Bill, Paul, Remi, Luce, Jean, Eric, Emma, Evan, Yoan, Yves, Marie, Mateo, and Aurore