Last name Песяк (Песяк 
, Pesjak 
) , globally, is a rare cognomen. The last name Песяк is habitual in Slovenia, where it is quite a common surname, Austria, where it is a rare surname, and Croatia.
| VARIANT | COUNTRY |
|---|---|
| Песяк | Kazakhstan, Ukraine, Russia |
| Pesjak | Germany, Austria, Croatia, United States, Slovenia |