In Croatia, Začkaj families are predominantly Croats (from Garesnica ), rarely Serbs. In the past century, relatively most of Croatian residents bearing this family name were born in Garesnica.
Prevalence
About 10 people with faimily name Začkaj live in Croatia today, in five households only. There were 10 of them in the middle of the past century, and their number remains constant. They are located in only four naselja i to in Zagreb (<5), Garesnica (<5), Kapelica (<5), and in Veliki Pasijan (<5).