In Croatia, Gerbac families are Italians by relative majority (from Buje ), rarely Slovenes (also from Buje ), and . In the past century, relatively most of Croatian residents bearing this family name were born in Slovenia and in Buje.
Prevalence
Only a few people with faimily name Gerbac live in Croatia today, in four households only. There were 10 of them in the middle of the past century, and their number remains constant. They are located in two Croatian counties, in 6 cities and another small place , mostly in Merisce (<5), Rijeka (<5), Porec (<5), Novigrad (<5), and in Juricani (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over twenty times, the first time 1902 in source Hartmann's General List of Apartments in Zagreb.