In Croatia, Petroczy families are predominantly Croats (from Bjelovar area ), rarely Hungarians (from Vukovar ), and . In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and in Cazins Region, Bosnia (Bihac area).
Prevalence
About 10 people with faimily name Petroczy 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 only threee naselja i to in Zagreb (<10), Vukovar (<5), and in Gornje Zdelice in Bjelovar area (<5).
Outside Croatia
Family name Petroczy is present in 9 countries on two continents. The family name "Petroczy " is used by some 100 people in Hungary and small number in the United States. "Petróczy " is used by some 800 people in Hungary , small number in the United States , and small number of people in Canada.
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1942 in source Phone Directory of the Independent State of Croatia 1942.
