Surname Ištuk (Ištuk 
) , worldwide, is a rare family name. The cognomen Ištuk is habitual in Southern Europe, particularly Croatia, where it is quite a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Ištuk | Croatia |
| ivo ištuk Yugoslavian association football player, BA (b. 1953) |
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| niko ištuk researcher (ORCID 0000-0003-4633-4201) |
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| hrvoje ištuk BA |
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Ana, Ivica, Marija, Mateja, Mislav, Philip, Gorana, Lucija, Josipa, Ivana, Joško, Silvija, Stjepan, Domagoj, Vedrana, Michaela, Katarina, Kristina, Tomislav, Hrvoje, Magdalena, Ilija, Jakov, Mira, Ante, Luka, Jozo, Niko, Nika, Ines, Ivan, Vesna, Marin, Matej, Saša, Andro, Anita, Karla, Pavao, Petra, Damir, Marko, and Gabrijela