Cognomen Greganic (Greganic 
) , throughout the world, is a very rare surname. The surname Greganic is habitual in Croatia, where it is a rare surname, Australia, where it is a very rare surname, and Canada, where it is an extremely rare surname. Not in comparison with a country's population, the name is most common in Australia, Croatia, and the United States.
| VARIANT | COUNTRY |
|---|---|
| Greganic | Croatia, Canada, United States, Australia |