Surname Petlák (Petlák 
) , across the world, is a very rare cognomen. The cognomen Petlák is characteristic of Eastern Europe, particularly Slovakia, where it is a rare surname, and Czechia.
| VARIANT | COUNTRY |
|---|---|
| Petlák | Czechia, Slovakia |
| vladimír petlák Czech volleyballist, CZ (b. 1946) |
|
|
| erich petlák (b. 1942) |
|