Cognomen Opačić (Opacic 
, Opačić ) , in the entire world, is quite a common surname. The cognomen Opačić is characteristic of Southern Europe, particularly Serbia, where it is quite a common surname, Croatia, and Bosnia and Herzegovina. Much less frequently, Opačić is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Opacic | Bosnia and Herzegovina, United States, United Kingdom, Serbia, Croatia |
| Opačić | Serbia, Croatia |
| german opačić HR (b. 1857) |
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milanka opačić Croatian politician, HR (b. 1968) |
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| nives opačić Croatian philologist and normative grammarian, HR (b. 1944) |
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| jovan opačić politician, DE (b. 1945) |
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| milan opačić Serbian basketball player and coach (b. 1960) |
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| ozren opačić actor |
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| zoë opačić GB |
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| rade opačić Serbian kickboxer (b. 1997) |
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Ana, Jovo, Jeka, Toni, Nada, Niko, Erik, Ines, Igor, Olga, Mario, Marta, Marko, Momir, Moana, Milan, Milka, Mirko, Sanja, Saša, Stevo, Stana, Jana, Luka, Lazo, Deni, Lea, Jan, Tea, Tin, Neo, Ina, Iva, Mara, Maja, Mila, Stoja, Mile, Sara, Sava, Savo, Soka, Sven, Alen, Anja, Anka, Rade, Rosa, Mira, and Anđa