In Croatia, Berko families are predominantly Croats (from Ilok ), rarely Hungarians (from Zagreb ). In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and in Backa, Vojvodina.
Prevalence
About 20 people with faimily name Berko live in Croatia today, in four households only. There were 20 of them in the middle of the past century, and their number remains constant. They are located in only five naselja i to in Zagreb (<10), Ilok (<5), Sesvete (<5), Punat on the Island of Krk (<5), and in Cerje (<5).
Outside Croatia
Family name Berko (including: Berkoh , Berco , Bercko and Bercho ) is present in 49 countries worldwide. "Berkoh " is used by some 1000 people in Ghana , small number in the United States , and small number of people in Egypt , small number of people in Indonesia.
In the sources analysed in the project Acta Croatica so far, the name is mentioned over five times, the first time 1683 in source Catholic Church Parish Records.