Family name Petraška (Petraška 
, Петрашка 
) , all over the world, is a very rare cognomen. The surname Petraška is characteristic of Lithuania, where it is a rare surname, Belarus, and Kazakhstan, where it is a very rare surname. Measured by absolute frequency, it is commonest in Belarus, Lithuania, and Russia.
| VARIANT | COUNTRY |
|---|---|
| Petraška | Lithuania |
| Петрашка | Kazakhstan, Russia, Belarus |