Family name Hlaca (Hlaca 
) , in the entire world, is a very rare cognomen. The cognomen Hlaca is habitual in Slovenia, where it is a rare surname, Croatia, and Australia, where it is a very rare surname. Not in comparison with a country's population, the name is most common in Southern Europe, particularly Italy, Slovenia, and Croatia. Much less frequently, Hlaca is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Hlaca | Australia, Croatia, Italy, Slovenia, United States |