Last name Legroux (Legroux 
) , in the entire world, is a rare family name. The family name Legroux is habitual in France, where it is a rare surname, Belgium, and New Zealand, where it is a very rare surname. In absolute terms, it is the most numerous in France, Belgium, and the United Kingdom. Very seldom, Legroux is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Legroux | Belgium, United Kingdom, United States, Germany, France |
| rené legroux French biologist, FR (b. 1877) |
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| armand legroux French politician (1922-1994), FR (b. 1922) |
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| alain legroux French politician, FR (b. 1957) |
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| isabelle legroux researcher (ORCID 0000-0002-5754-6077) |
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| laurie legroux researcher |
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Mr, Yann, Yves, Marie, Manon, Maela, Mirco, Sarah, Simon, Serge, Sonia, Stijn, Alice, Alain, Andre, Annie, Ambre, Cathy, Cindy, Bruno, Bryan, Kenna, Fred, Emma, Eric, Niko, Ms, Cã, Ben, Bã, Lea, Jã, Eli, Marc, Mlle, Alex, Kevin, Alan, Anja, Arne, Aude, Axel, Dany, Dirk, Luis, Léa, Jean, Nick, Anne, and Robin