Peternac families are Croats and they are mostly from Velika Gorica. In the past century, relatively most of Croatian residents bearing this family name were born in Velika Gorica and Zagreb. In Gornje Podotočje in Velika Gorica every fifth inhabitant had the family name Peternac.
Prevalence
About 100 people with faimily name Peternac live in Croatia today, in 40 households. There were 100 of them in the middle of the past century, and their number remains constant. They are located in threee Croatian counties, in 6 cities and 5 other places, mostly in Zagreb (25), Gornje Podotocje (20), Velika Gorica (20), Brcevec (20), and in Celine (<10).
Outside Croatia
Family name Peternac is present in two countries on two continents. The family name "Peternac " is used by few people in the United States.
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1929 in source Emigration Commission Zagreb.