Last name Kriznjak (Kriznjak 
) , throughout the world, is a very rare family name. The cognomen Kriznjak is characteristic of Uruguay, where it is a rare surname, Norway, where it is a very rare surname, and Argentina. Much less frequently, Kriznjak is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Kriznjak | Germany, Norway, Argentina, Italy, Uruguay |