Last name Kliuchnyk (Kliuchnyk 
) , around the world, is an extremely rare cognomen. The family name Kliuchnyk is characteristic of Estonia, where it is a rare surname, Ukraine, where it is an extremely rare surname, and the United States.
| VARIANT | COUNTRY |
|---|---|
| Kliuchnyk | Ukraine, Estonia, United States |
| diana kliuchnyk (b. 1994) |
|