Surname Mainguy (Mainguy 
) , globally, is quite a rare last name. The cognomen Mainguy is characteristic of France, where it is quite a rare surname, Canada, and Latvia, where it is a rare surname. Not in comparison with a country's population, the name is most common in France, Canada, and the United States. Very seldom, Mainguy is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Mainguy | Canada, United States, Poland, France, Spain |
| paul mainguy French politician, FR (b. 1908) |
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| maurice mainguy Canadian architect, CA (b. 1910) |
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| noël mainguy architect, founding and director of the Quebec School of Architecture, CA (b. 1925) |
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| daniel mainguy Canadian officer (1930-2010), CA (b. 1930) |
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| pascal mainguy French politician, FR (b. 1956) |
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| dominique mainguy French comics artist, FR (b. 1965) |
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| irène mainguy French writer, FR (b. 1969) |
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| susan mainguy Peerage person ID=182331 |
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| james mainguy Peerage person ID=182332 |
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| peter mainguy Peerage person ID=182329 |
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| roger ferdinand mainguy (died 1959) |
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| marie-noël mainguy performing artist in Canada |
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| marc mainguy Ph.D. 1999 |
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| nancy mainguy Peerage person ID=182328 |
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| daniel mainguy French jurist |
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