Surname Сауер (Sauer 
, Сауер 
, Sauyer 
) , around the world, is a common cognomen. The surname Сауер is characteristic of Western Europe, particularly Germany, where it is quite a common surname, Austria, and Luxembourg, where it is quite a rare surname. Not in comparison with a country's population, it most frequently occurs in Germany, the United States, and Brazil. Much less frequently, Сауер is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sauer | Brazil, Argentina, United States, Germany, Austria |
| Сауер | Russia, Kazakhstan, Ukraine |
| Sauyer | Spain, Argentina, France, Mexico, United States |
| Saouer | France, Greece |