Cognomen Aust-Claus (Aust-Claus 
) , throughout the world, is an extremely rare last name. The cognomen Aust-Claus is characteristic of Western Europe, particularly Germany, where it is an extremely rare surname. Parts of the name also exists independently as a last name Aust, and a first name Claus.
| VARIANT | COUNTRY |
|---|---|
| Aust-Claus | Germany |