Cognomen Guilloux (Guilloux 
, Гийу 
) , globally, is quite a common surname. The cognomen Guilloux is characteristic of France, where it is quite a common surname, Suriname, where it is quite a rare surname, and Luxembourg. In absolute terms, the name is most common in France, Brazil, and the United States. Very seldom, Guilloux is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Guilloux | Belgium, Brazil, France, United States, Suriname |
| Гийу | Russia |
| alexis-jean-marie guilloux Roman Catholic archbishop (b. 1819) |
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| victor-marie guilloux Roman Catholic clergyman (b. 1823) |
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| jean-marie guilloux French writer (1848-1900), FR (b. 1848) |
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louis guilloux French writer, FR (b. 1899) |
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pierre guilloux French high jumper (1901-1937), FR (b. 1901) |
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| alphonse guilloux French sculptor (1852-1939), FR (b. 1852) |
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| charles guilloux French artist (1866–1946), FR (b. 1866) |
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| albert guilloux FR (b. 1871) |
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arnaud guilloux French triathlete and bicycle racer, FR (b. 1988) |
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| maurice le guilloux cyclist, FR (b. 1950) |
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| jean-luc guilloux French politician, FR (b. 1959) |
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| michel guilloux (b. 1953) |
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| christian guilloux FR (b. 1958) |
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| loïc guilloux FR (b. 1961) |
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| jean-philippe guilloux researcher (b. 1977) |
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