Surname Гритцак (Гритцак 
, Gritsak 
) , in the entire world, is a rare last name. The cognomen Гритцак is characteristic of Estonia, where it is a rare surname, Russia, where it is a very rare surname, and Ukraine. Measured by absolute frequency, it is the most numerous in Russia, the United States, and Estonia.
| VARIANT | COUNTRY |
|---|---|
| Гритцак | Russia |
| Gritsak | Ukraine, Italy, Estonia, United States, Russia |