Cognomen クラウス (Klaus 
, Claus , Kraus 
, along with others...) , around the globe, is a widespread last name. The last name クラウス is habitual in Western Europe, particularly Germany, where it is a common surname, Austria, where it is quite a common surname, and Liechtenstein (explore the name in all countries). Measured by absolute frequency, it is the most numerous in Germany, the United States, and Brazil. More prevalently, クラウス is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Klaus, Claus | Germany, Austria, United States, Denmark, Brazil |
| Kraus | Germany, Czechia, Austria, United States, Brazil |
| Krauss, Klauss | Germany, Austria, United States, Poland, Brazil |
| Klaws | Germany, Spain, United States, Canada, Brazil |
| クラウス | Japan |