In Croatia, Koronc families are mainly Croats (from Grubisno Polje ), rarely Hungarians (also from Grubisno Polje ), and very rarely Serbs. In the past century, relatively most of Croatian residents bearing this family name were born in Grubisno Polje.
Prevalence
About 20 people with faimily name Koronc live in Croatia today, in 6 households. They are located in three Croatian cities only: in Grubisno Polje (10), Ivanic-Grad (<5), and in Zagreb (<5).
Outside Croatia
Family name Koronc is present in four countries on two continents.