Family name Douin (Douin 
) , across the world, is quite a rare last name. The family name Douin is habitual in Belgium, where it is quite a rare surname, France, and Ivory Coast, where it is a rare surname.
| VARIANT | COUNTRY |
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| Douin | France, United States, Belgium, Ivory Coast, Argentina |
| charles isidore douin French botanist (1858-1944), FR (b. 1858) |
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| robert charles victor douin botanist (1892-1965), FR (b. 1892) |
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| georges douin FR (b. 1884) |
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| jean-philippe douin French general, FR (b. 1940) |
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| jean-luc douin (b. 1947) |
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| stéphane douin researcher (ORCID 0000-0001-5420-2888) |
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| douin de lavesne French writer, FR |
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| martial douin |
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Mr, Rita, Dana, Dave, Lisa, Luis, Lynn, Léa, Josh, Joel, Jean, Juan, Tina, Neji, Frã, Yann, Yves, Marie, Megan, Mione, Sarah, Simon, Paul, Karl, Beth, Benj, Ms, Sue, Sã, Bau, Guy, Leo, Luc, Eva, Vã, Mary, Susan, Matt, Momo, Mike, Sara, Stã, Alan, Andy, Anne, Adam, Axel, Clã, Mael, and Sofia