Family name Duclaux (Duclaux 
) , throughout the world, is quite a rare last name. The family name Duclaux is characteristic of Western Europe, particularly France, where it is quite a rare surname, Austria, where it is a rare surname, and Belgium, where it is a very rare surname. Measured by absolute frequency, it is the most numerous in France, Austria, and the United States. Very seldom, Duclaux is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Duclaux | Austria, Hungary, United States, Canada, France |
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antoine duclaux French painter (1783-1868), FR (b. 1783) |
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| paulin duclaux French politician (1746-1809), FR (b. 1746) |
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| joseph duclaux French politician, FR (b. 1752) |
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| augustin duclaux French politician, FR (b. 1764) |
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| pierre alexis duclaux French officer (1775-1828), FR (b. 1775) |
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émile duclaux microbiologist and chemist, FR (b. 1840) |
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| sosthène duclaux French botanist (1791-1856), FR (b. 1791) |
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mary duclaux Anglo-French writer (1857-1944), GB (b. 1857) |
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| jacques duclaux French biologist and chemist, FR (b. 1877) |
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| jean-claude duclaux French politician, FR (b. 1959) |
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| thierry duclaux FR (b. 1952) |
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| lise duclaux French visual artist, FR (b. 1970) |
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| julie duclaux French film editor, FR |
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| geneviève duclaux botanist |
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| guillaume duclaux researcher, ORCID id # 0000-0002-9512-7252 (b. 1981) |
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Mr, Eric, Fred, Frã, Fynn, Ivan, Igor, Olga, Omer, Yann, Yoan, Yves, Marie, Mel'O, Myles, Sarah, Serge, Alain, Andre, Annie, Agnes, Agnã, Elie, Carol, Taly, Joel, Ms, Amy, Cã, Rã, Eva, Val, Marc, Mary, Sean, Stã, Alex, Anne, Axel, Beth, Kirk, Kimy, Rene, Remi, Rudy, Lisa, Jany, Jean, and Cassy