Family name Kalajdžić (Kalajdžić 
) , globally, is a rare cognomen. The last name Kalajdžić is characteristic of Southern Europe, particularly Croatia, where it is quite a rare surname, Bosnia and Herzegovina, and Serbia.
| VARIANT | COUNTRY |
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| Kalajdžić | Serbia, Croatia, Bosnia and Herzegovina |
| muhamed bekir kalajdžić Bosnian writer, BA (b. 1892) |
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| avdo kalajdžić Bosnia and Herzegovina footballer, BA (b. 1959) |
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| željko kalajdžić Serbian footballer, RS (b. 1978) |
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| abdurahim kalajdžić researcher (ORCID 0000-0002-2824-2779) |
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| gojko kalajdžić Ph.D. University of Belgrade 1982 |
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Mia, Marica, Marija, Mladen, Srđan, Andrej, Bojana, Nikola, Zlatko, Zoran, Martina, Anđela, Dražen, Vedrana, Željko, Željka, Svetlana, Katarina, Nikolina, Muhamed, Svjetlana, Elvis, Goran, Ana, Lea, Tea, Ema, Ivo, Mira, Miro, Sara, Josip, Rene, Igor, Marko, Matej, Amina, Ahmet, Boris, Karlo, Darko, Ivan, and Aleksandar