Surname Trojanović (Trojanović 
, Троянович 
) , all around the world, is a rare cognomen. The surname Trojanović is characteristic of Croatia, where it is quite a rare surname, Belarus, and Serbia.
| VARIANT | COUNTRY |
|---|---|
| Trojanović | Serbia, Croatia |
| Троянович | Kazakhstan, Russia, Ukraine, Belarus |
| sima trojanović (b. 1862) |
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| sima trojanović (b. 1862) |
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| sima trojanović (b. 1862) |
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| uroš trojanović Serbian writer (b. 1882) |
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| nikola trojanović Yugoslav swimmer, HR (b. 1928) |
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