In Croatia, Vunjak families are mainly Croats (from Nasice ), less frequently Serbs. In the past century, relatively most of Croatian residents bearing this family name were born in Nasice and Osijek.
Prevalence
About 20 people with faimily name Vunjak live in Croatia today, in 11 households. There were 70 of them in the middle of the past century, and their number decreased significantly. They are located in 7 Croatian counties and threee other places, mostly in Zagreb (<10), Osijek (<5), Zadar (<5), Pula (<5), and in Debelo Brdo in Obrovac area (<5).
Outside Croatia
Family name Vunjak is present in 6 countries on three continents. The family name "Vunjak " is used by small number of 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 1917 in source List of Dignitaries, Officials and Public Servants of the Kingdom of Croatia-Slavonia.