Cognomen Ніклаус (Ніклаус 
) , in the entire world, is an extremely rare surname. The last name Ніклаус is habitual in Eastern Europe, particularly Ukraine, where it is an extremely rare surname. Also, Ніклаус is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Ніклаус | Ukraine |