Rnjak families are mainly Serbs and they are mostly from Knin area , but often Croats (from Zadar). In the past century, relatively most of Croatian residents bearing this family name were born in Benkovac and Zadar. In Buković in Benkovac every seventh inhabitant had the family name Rnjak.
Prevalence
About 200 people with faimily name Rnjak live in Croatia today, in 90 households. There were 270 of them in the middle of the past century, and their number decreased by 30 percent. They are located in 8 Croatian counties, in 19 cities and 12 other places, mostly in Bukovic (40), Zadar (20), Benkovac (15), Split (15), and in Pula (10).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over ten times, the first time 1917 in source List of Dignitaries, Officials and Public Servants of the Kingdom of Croatia-Slavonia.