Cognomen Гритсак (Grytsak 
, Гритсак 
, Gritsak 
) , in the world, is a rare last name. The family name Гритсак is habitual in Estonia, where it is a rare surname, Russia, where it is a very rare surname, and Ukraine. Not in comparison with a country's population, the name is most common in Russia, the United States, and Ukraine.
| VARIANT | COUNTRY |
|---|---|
| Grytsak | Ukraine, United States, France, Spain |
| Гритсак | Russia |
| Gritsak | Ukraine, Estonia, Russia, Italy, United States |