Cognomen Sivonjic (Sivonjic 
) , in the world, is a rare family name. The cognomen Sivonjic is characteristic of Bosnia and Herzegovina, where it is quite a rare surname, Norway, where it is a rare surname, and New Zealand, where it is a very rare surname. Not in comparison with a country's population, it most frequently occurs in Bosnia and Herzegovina, Norway, and Germany.
| VARIANT | COUNTRY |
|---|---|
| Sivonjic | Germany, Norway, Bosnia and Herzegovina, France, New Zealand |