Žvorc families are Croats and they are mostly from Cakovec. According to some sources they are from the areas of Poland and Germany, Slezije. In the past century, relatively most of Croatian residents bearing this family name were born in Cakovec and Prelog.
Prevalence
About 220 people with faimily name Žvorc live in Croatia today, in 90 households. There were 160 of them in the middle of the past century, and their number increased by 40 percent. They are located in 8 Croatian counties, in 8 cities and 30 other places, mostly in Cakovec (50), Gorican in Cakovec area (20), Prelog (20), Turcisce in Prelog area (15), and in Zagreb (15).
Outside Croatia
At least one family with this surname emigrated from Croatia to the United States. Family name Žvorc is present in four countries.
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.