Cognomen Čuljak (Чуляк 
, Čuljak 
) , across the world, is quite a rare family name. The family name Čuljak is characteristic of Croatia, where it is quite a common surname, Bosnia and Herzegovina, and Ukraine, where it is a very rare surname.
| VARIANT | COUNTRY |
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| Чуляк | Ukraine, Russia |
| Čuljak | Bosnia and Herzegovina, United States, Croatia, Germany |
| ivica čuljak Croatian singer of punk music (1960-1992), HR (b. 1960) |
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| dijana čuljak Croatian television journalist (b. 1968) |
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| krešimir čuljak Croatian rower, HR (b. 1970) |
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| ivana čuljak researcher |
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| tomislav čuljak association football player, HR (b. 1987) |
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| dajana čuljak HR |
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Mia, Lara, Leon, Lena, Lora, Luka, Jana, Jaka, Jure, Toni, Nada, Niko, Nika, Nina, Neda, Vice, Viva, Vera, Fran, Inga, Ines, Ivan, Lana, Grgo, Dora, Rita, Ana, Lea, Tea, Tin, Ena, Ema, Eva, Iva, Mari, Mara, Zora, Mate, Maja, Mira, Mijo, Sara, Alen, Ante, Anka, Adam, Aida, Pero, Mato, and Marin