Cognomen Trojic (Trojic 
) , in the entire world, is a very rare last name. The last name Trojic is habitual in Serbia, where it is quite a rare surname, Croatia, where it is a very rare surname, and Germany, where it is an extremely rare surname. Not in comparison with a country's population, the name is most common in Serbia, Germany, and the United States.
| VARIANT | COUNTRY |
|---|---|
| Trojic | Germany, Serbia, Croatia, United States |