Surname Mont-Louis (Mont-Louis 
) , in the world, is a very rare family name. The last name Mont-Louis is habitual in Canada, where it is an extremely rare surname, France, and the United States. Very seldom, Mont-Louis is the forename as well as the last name. Parts of the name also exists independently as a last name Mont, and a first name Louis.
| VARIANT | COUNTRY |
|---|---|
| Mont-Louis | United States, France, Canada |