Antunac families are Croats and they are mostly from Sibenik. In the past century, relatively most of Croatian residents bearing this family name were born in Sibenik and Zadar.
Prevalence
About 80 people with faimily name Antunac live in Croatia today, in 40 households. There were 80 of them in the middle of the past century, and their number remains constant. They are located in 7 Croatian counties, in 7 cities and 6 other places, mostly in Sibenik (45), Zagreb (15), Zadar (<10), Split (<10), and in Karlovac (<5).
Outside Croatia
Family name Antunac is present in 7 countries on four continents.
In the sources analysed in the project Acta Croatica so far, the name is mentioned over ten times, the first time 2007 in source Encyclopaedia of Croatian Surnames.