Family name Kalhoff-Willsch (Kalhoff-Willsch 
) , all around the world, is a very rare last name. The cognomen Kalhoff-Willsch is habitual in Western Europe, particularly Germany, where it is a very rare surname. Parts of the name also exists independently as a last name Kalhoff, and a last name Willsch.
| VARIANT | COUNTRY |
|---|---|
| Kalhoff-Willsch | Germany |