Cognomen Nickolaus (Nickolaus 
, Николаус 
, ניקולאוס 
) , in the entire world, is quite a rare last name. The family name Nickolaus is characteristic of Germany, where it is a rare surname, Tanzania, and Kazakhstan. Not in comparison with a country's population, this name is the most popular in Germany, the United States, and Tanzania. Also, Nickolaus is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Nickolaus | Germany, Tanzania, Indonesia, Canada, United States |
| Николаус | Kazakhstan, Russia, Kyrgyzstan, Ukraine |
| ניקולאוס | Israel |
|
reinhold nickolaus DE (b. 1952) |
|
| john m. nickolaus, jr. American cinematographer, US (b. 1913) |
|
|
| axel nickolaus DE (b. 1951) |
|
|
| lena nickolaus |
|
|
| robert nickolaus |
|