Family name كلاوس (Klaus 
, Claus , كلاوس 
) , worldwide, is a common last name. The surname كلاوس is characteristic of Western Europe, particularly Liechtenstein, where it is quite a common surname, Germany, and Austria (explore the name in all countries). Not in comparison with a country's population, it most frequently occurs in Germany, the United States, and Brazil. More prevalently, كلاوس is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Claus, Klaus | Austria, Germany, Brazil, Denmark, United States |
| كلاوس | Iraq |
| Klauss | Austria, Germany, Brazil, Spain, United States |