Cognomen Šišić (Sisic 
, Šišić 
) , throughout the world, is quite a common last name. The cognomen Šišić is habitual in Southern Europe, particularly Bosnia and Herzegovina, where it is a common surname, Croatia, where it is quite a rare surname, and Serbia. Much less frequently, Šišić is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Sisic | Germany, Croatia, Bosnia and Herzegovina, United States, Serbia |
| Šišić | Slovenia, Croatia, Bosnia and Herzegovina, United States, Serbia |
| ferdo šišić Croatian historian, HR (b. 1869) |
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mirnes šišić footballer, SI (b. 1981) |
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| ismet šišić Yugoslav footballer, BA (b. 1958) |
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| adnan šišić researcher |
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| antonio šišić association football player, HR (b. 1983) |
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| aldijana šišić Bosnian association football player, BA |
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Ana, Emir, Hase, Iris, Irma, Ivan, Igor, Marin, Mario, Marko, Matej, Matea, Maida, Majra, Mirza, Munir, Sandi, Sanin, Samir, Samra, Suvad, Senad, Enis, Edna, Edin, Elma, Ema, Ivo, Maky, Maja, Mira, Alen, Anka, Amar, Amir, Amer, Senka, Amel, Adam, Adis, Adna, Asja, Azra, Kata, Dino, Lara, Luka, Jozo, Amra, and Sevad