Zrnc families are Croats and they are mostly from Klanjec. In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and Klanjec.
Prevalence
About 70 people with faimily name Zrnc live in Croatia today, in 30 households. There were 110 of them in the middle of the past century, and their number decreased by 30 percent. They are located in 7 Croatian counties, in 7 cities and 7 other places, mostly in Zagreb (25), Greda (15), Novi Dvori Klanjecki (<10), Velika Gorica (<10), and in Ledine Klanjecke (<10).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over five times, the first time 1938 in source Phone Book - Zagreb 1938.