In Croatia, Kvak families are generally Croats (from Nasice ), very rarely Slovaks (also from Nasice ). In the past century, relatively most of Croatian residents bearing this family name were born in Nasice and Orahovica.
Prevalence
About 20 people with faimily name Kvak live in Croatia today, in 7 households. There were 20 of them in the middle of the past century, and their number remains constant. They are located in four Croatian counties, two cities and four other places, mostly in Nasice (<10), Zagreb (<5), Sesvete (<5), Breznica Nasicka in Nasice area (<5), and in Radovanci in Pozega area (<5).