Cognomen Lavoix (Lavoix 
) , throughout the world, is a rare family name. The family name Lavoix is characteristic of France, where it is a rare surname, Belgium, where it is a very rare surname, and Canada. Not in comparison with a country's population, it is the most numerous in France, Canada, and the United States. Much less frequently, Lavoix is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Lavoix | Belgium, Canada, Spain, France, United States |
| henri michel lavoix 19th century French numismatic, FR (b. 1820) |
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| henri marie françois lavoix French musicologist, FR (b. 1846) |
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| patrick lavoix (b. 1941) |
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| marcel lavoix French politician, FR (b. 1955) |
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| valérie lavoix French sinologist |
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| précieuse lavoix Haitian author and journalist, HT |
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Mr, Agnes, Bruno, René, David, Diana, Jayne, Henri, Heidy, Fanny, Marina, Marion, Marcel, Maryse, Maxime, Myriam, Satela, Shalna, Sylvie, Alexis, Annie, Arnaud, Andre, Alice, Kã, Guy, Marc, Anne, Axel, Citm, Paul, Rene, Léa, Josy, Jean, Nils, Eric, Yann, Marie, Manon, Sarah, Simon, Serge, Alain, and Agnès