Petretić families are predominantly Croats and they are mostly from Ozalj area , less frequently Italians. In the past century, relatively most of Croatian residents bearing this family name were born in Ozalj area and in Zagreb. In Hartje in Ozalj area every second inhabitant had the family name Petretić.
Prevalence
About 150 people with faimily name Petretić live in Croatia today, in 60 households. There were 150 of them in the middle of the past century, and their number remains constant. They are located in 6 Croatian counties, in 12 cities and 21 other places, mostly in Zagreb (30), Hartje in Ozalj area (15), Krsete (10), Rijeka (<10), and in Kaldir in Buzet area (<10).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over five times, the first time 1929 in source Emigration Commission Zagreb.