Cvok families are Croats and they are mostly from Oroslavje area. In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and in Oroslavje area.
Prevalence
About 60 people with faimily name Cvok live in Croatia today, in 30 households. There were 90 of them in the middle of the past century, and their number decreased by 30 percent. They are only located in in 6 Croatian cities and 8 other places, mostly in Zagreb (30), Luka in Oroslavje area (<10), Kutina (<5), Vrbovec (<5), and in Donja Bistra in Oroslavje area (<5).
Outside Croatia
Family name Cvok (including: Chwok , Zvok and Cwok ) is present in 6 countries on two continents. "Cwok " is used by few people in the United States.
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 2007 in source Encyclopaedia of Croatian Surnames.