Family name Гутсулиак (Гутсулиак 
, Gutsuliak 
, Gutsulyak 
) , in the entire world, is a rare last name. The last name Гутсулиак is habitual in Bulgaria, where it is a rare surname, Estonia, and Russia, where it is a very rare surname. In absolute terms, it is the most numerous in Russia, the United States, and Bulgaria.
| VARIANT | COUNTRY |
|---|---|
| Гутсулиак | Russia |
| Gutsuliak | Spain, Ukraine, Estonia, United States |
| Gutsulyak | Russia, Italy, Bulgaria, United States, Ukraine |
| Goutsouliak | Canada, United States |