Family name Grubacic (Grubacic 
) , throughout the world, is a rare cognomen. The family name Grubacic is characteristic of Southern Europe, particularly Bosnia and Herzegovina, where it is quite a rare surname, Serbia, and Italy, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Grubacic | United States, Bosnia and Herzegovina, Serbia, Italy, Canada |