Last name Nykolaichuk (Nykolaichuk 
) , in the world, is a very rare surname. The cognomen Nykolaichuk is habitual in Spain, where it is a very rare surname, Canada, where it is an extremely rare surname, and Ukraine.
| VARIANT | COUNTRY |
|---|---|
| Nykolaichuk | Canada, Spain, Ukraine |
| yaroslav nykolaichuk researcher |
|