Cognomen Kurliak (Kurliak 
, Курляк 
) , all over the world, is a rare surname. The surname Kurliak is habitual in Eastern Europe, particularly Ukraine, where it is a rare surname, Russia, where it is a very rare surname, and Poland. Measured by absolute frequency, this name is the most popular in Ukraine, Russia, and the United States.
| VARIANT | COUNTRY |
|---|---|
| Kurliak | Poland, Canada, Brazil, United States |
| Курляк | Ukraine, Russia |