Vadas families are Croats and they are mostly from Prelog. In the past century, relatively most of Croatian residents bearing this family name were born in Prelog and Cakovec.
Prevalence
About 110 people with faimily name Vadas live in Croatia today, in 40 households. There were 130 of them in the middle of the past century, and their number decreased by 10 percent. They are only located in in 6 Croatian cities and 11 other places, mostly in Draskovec (35), Zagreb (20), Cakovec (10), Sveta Marija in Prelog area (<10), and in Popovac in Beli Manastir area (<10).
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.