Last name Penjak (Penjak 
) , worldwide, is a very rare surname. The cognomen Penjak is habitual in Croatia, where it is a rare surname, Argentina, where it is a very rare surname, and Germany, where it is an extremely rare surname. Also, Penjak is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Penjak | Croatia, Argentina, India, United States, Germany |
| vladimír penjak (b. 1943) |
|