Family name Krulj (Krulj 
) , in the entire world, is quite a rare cognomen. The family name Krulj is habitual in Southern Europe, particularly Bosnia and Herzegovina, where it is quite a common surname, Serbia, where it is quite a rare surname, and Croatia, where it is a rare surname.
| VARIANT | COUNTRY |
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| Krulj | Bosnia and Herzegovina, Spain, United States, Serbia, Croatia |
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vladimir krulj French and Serbian economist (b. 1968) |
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| rajne krulj (b. 1961) |
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| jelena krulj researcher (ORCID 0000-0001-7348-3961) |
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| igor krulj Swedish footballer and manager, HR (b. 1988) |
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Mr, Lidija, Jovana, Jelena, Tamara, Tijana, Natasa, Nikola, Nikša, Helena, Damjan, Olgica, Ksenija, Nemanja, Velimir, Kristina, Ljiljana, Vladimir, Christine, Kornelija, Aleksandra, Slavisa, Aleksander, Danilo, Amanda, Ena, Luka, Jovo, Milan, Sanja, Bojan, Karlo, Petar, Risto, Branko, Dusan, Goran, Vanja, Ivana, Marina, Mladen, Sofija, Stefan, Srdjan, Andrej, Draga, and Aleksandar