Surname Castagné (Castagné 
) , in all the world, is a rare cognomen. The family name Castagné is characteristic of France, where it is a rare surname, Australia, where it is a very rare surname, and Canada, where it is an extremely rare surname. Not in comparison with a country's population, this name is the most popular in France, Australia, and Mexico. Much less frequently, Castagné is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Castagné | Mexico, Canada, Australia, France, United States |
| antoine castagné French politician (1766-1837), FR (b. 1766) |
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| joseph castagné French ethnographer (1875-1958), FR (b. 1875) |
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| daniel castagné French politician, FR (b. 1953) |
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| bernard castagné French racecar driver, FR (b. 1958) |
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| vincent castagné researcher (b. 1963) |
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| alain castagné French Righteous Among the Nations, FR |
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| benjamin castagné researcher (ORCID 0000-0002-4588-8651) |
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| rosa castagné French Righteous Among the Nations, FR |
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Guy, David, Laura, Laure, Lucie, Lucas, Julie, Nadia, Elise, Enora, Fanny, Odile, Marine, Marion, Magali, Maxime, Maëva, Michel, Myriam, Sandra, Samuel, Sabine, Rémy, Rémi, Cyril, Cindy, Flo, Marc, Anto, Anna, Anne, Axel, Babs, Beba, Paul, Léa, Sophie, Joel, Emma, Yves, Marie, Manon, Sarah, Simon, Serge, Alain, Anais, Clara, Jean, and Sylvie