In Croatia, Petretich families are Italians (from Buzet area ). In the past century, relatively most of Croatian residents bearing this family name were born in Buzet area and in Slovenia.
Prevalence
Only a few people with faimily name Petretich live in Croatia today, in two households only. They are located in only threee Croatian places: in Zambratija (<5), Savudrija (<5), and in Triban (<5).
Outside Croatia
Family name Petretich is present in 7 countries on four continents. The family name "Petretich " is used by small number of people in the United States and small number in Germany.
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.