In Croatia, Zvrko families are almost entirely Croats (from Dubrovnik area ), very rarely Slovenes (from Dubrovnik ). In the past century, relatively most of Croatian residents bearing this family name were born in Dubrovnik and in Dubrovnik area.
Prevalence
About 30 people with faimily name Zvrko live in Croatia today, in 13 households. There were 30 of them in the middle of the past century, and their number remains constant. They are located in threee Croatian counties, threee cities and threee other places, mostly in Drvenik in Dubrovnik area (20), Dubrovnik (10), in Srebreno (<10) and Cavtat (<5) in Dubrovnik area, and in Zagreb (<5).