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 | Russia, Kazakhstan, Ukraine |
| Pesjak | Croatia, Slovenia, United States, Germany, Austria |