In Croatia, Dujnić families are generally Croats (from Petrinja ), very rarely Serbs. In the past century, relatively most of Croatian residents bearing this family name were born in Petrinja and Sisak.
Prevalence
About 30 people with faimily name Dujnić live in Croatia today, in 16 households. There were 20 of them in the middle of the past century, and their number increased by 30 percent. They are located in 7 Croatian counties, in 8 cities and another small place , mostly in Petrinja (10), Zagreb (<10), Koprivnica (<10), Karlovac (<5), and in Hrvatska Kostajnica (<5).
Outside Croatia
Family name Dujnić is present in five countries on two continents. The family name "Dujnic " is used by small number of people in Slovakia and small number 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.