In Croatia, Dvoršak families are almost entirely Croats (from Pregrada area ), very rarely Slovenes (from Middle Bosnia ). In the past century, relatively most of Croatian residents bearing this family name were born in Pregrada area and in Zagreb.
Prevalence
About 50 people with faimily name Dvoršak live in Croatia today, in 20 households. There were 60 of them in the middle of the past century, and their number decreased by 10 percent. They are located in four Croatian counties, in 7 cities and 8 other places, mostly in Zagreb (15), Vodnjan in Pula area (10), Jelenjak in Pregrada area (<10), Klanjec (<5), and in Klupci in Krapina area (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over five times, the first time 1902 in source Hartmann's General List of Apartments in Zagreb.