Cognomen Prtenjak (Prtenjak 
) , in all the world, is a rare family name. The family name Prtenjak is habitual in Southern Europe, particularly Serbia, where it is quite a rare surname, Slovenia, and Croatia, where it is a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Prtenjak | Slovenia, Serbia, Canada, Croatia, United States |
| ivan prtenjak Croatian architect, born 1939 (b. 1939) |
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| nebojša prtenjak Serbian footballer, RS (b. 1983) |
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