In Croatia, Kocsis families are mainly Hungarians (from Slatina ), equally Croats (from Osijek ). In the past century, relatively most of Croatian residents bearing this family name were born in Osijek and in Backa, Vojvodina.
Prevalence
About 10 people with faimily name Kocsis live in Croatia today, in five households only. There were 0 of them in the middle of the past century, and their number multiplied. They are located in four Croatian cities only: in Zagreb (<10), Osijek (<10), Slatina (<5), and in Kastel Stafilic (<5).
Outside Croatia
Family name Kocsis is present in 39 countries worldwide. The family name "Kocsis " is used by some 20000 people in Hungary , about 3000 in the United States , and some 3000 people in Romania.
In the sources analysed in the project Acta Croatica so far, the name is mentioned over ten times, the first time 1902 in source Hartmann's General List of Apartments in Zagreb.