Last name Potočnjak (Potočnjak 
, Поточняк 
) , all over the world, is a rare surname. The surname Potočnjak is characteristic of Croatia, where it is quite a rare surname, Ukraine, and Slovenia, where it is a rare surname. Not in comparison with a country's population, this name is the most popular in Ukraine, Croatia, and Russia.
| VARIANT | COUNTRY |
|---|---|
| Potočnjak | Slovenia, Croatia |
| Поточняк | Ukraine, Russia |
| franko potočnjak Croatiain politician and writer, HR (b. 1862) |
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dragica potočnjak Slovenian actress, SI (b. 1958) |
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| žarko potočnjak Croatian actor, HR (b. 1946) |
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| iva potočnjak researcher |
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| jakob potočnjak Croatian organ builder |
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| ines potočnjak researcher |
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Mia, Damir, Draga, Goran, Josip, Nives, Neven, Vilim, Vjera, Frane, Ivana, Ivica, Zoran, Šime, Marina, Marica, Marija, Matija, Mišel, Andrej, Karmen, Katica, Davor, Dejan, Pedro, Petar, Eni, Alan, Ante, Kata, Dino, Dora, Lana, Jure, Nada, Niko, Patrik, Ines, Ivka, Igor, Zora, Marin, Mario, Matea, Sanja, Saša, Karlo, Pavao, Ivan, and Lucija