Stunja families are Croats and they are mostly from Samobor. In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and Samobor. In Petkov Breg in Samobor every third inhabitant had the family name Stunja.
Prevalence
About 160 people with faimily name Stunja live in Croatia today, in 60 households. There were 110 of them in the middle of the past century, and their number increased by 40 percent. They are located in 7 Croatian counties, in 10 cities and 17 other places, mostly in Petkov Breg (60), Gornje Oresje (15), Rakov Potok (10), Koprivnica (<10), and in Donji Desinec (<10).
Outside Croatia
At least ten families with this surname emigrated from Croatia to the United States (9) and Germany (1). Family name Stunja is present in five countries on two continents. The family name "Stunja " is used by some 60 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 2007 in source Encyclopaedia of Croatian Surnames.