Surname Gayant (Gayant 
) , across the world, is a rare last name. The surname Gayant is habitual in France, where it is a rare surname, Spain, where it is a very rare surname, and the United States, where it is an extremely rare surname. Much less frequently, Gayant is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Gayant | United States, India, Spain, France |
| antoine-nicolas gayant French engineer, FR (b. 1756) |
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marcel gayant FR (b. 1915) |
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louis gayant French surgeon and anatomist, FR |
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| martial gayant French cyclist, FR (b. 1962) |
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| françoise gayant |
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| marcel gayant |
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| louis gayant |
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