Surname St-Louis (St-Louis 
) , around the world, is quite a rare family name. The cognomen St-Louis is characteristic of Canada, where it is quite a rare surname, Haiti, and New Zealand. Parts of the name also exists independently as a first name Louis.
| VARIANT | COUNTRY |
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| St-Louis | United States, Haiti, Canada, France, New Zealand |
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jean-pierre st-louis director of photography, CA (b. 1951) |
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martin st-louis Canadian ice hockey player, CA (b. 1975) |
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| france st-louis Canadian ice hockey player, CA (b. 1958) |
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| doug st-louis Canadian singer, CA |
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| ronald st-louis researcher ORCID: 0000-0003-4711-1392 |
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| dominic l. st-louis performing artist in Canada |
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| ariel st-louis lamoureux related to cinema |
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| nicole st-louis Canadian astrophysicist, CA |
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| etienne st-louis researcher |
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| michel-henri st-louis Canadian general, CA |
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| annie st-louis botanist at Laval University, CA |
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| françois st-louis Quebecois political candidate, CA |
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| yvon st-louis Quebec novelist |
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| patrick st-louis Ph.D. Université de Montréal 2007 |
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| mikaël st-louis CA |
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