In Croatia, Streljak families are Croats (from Ozalj ). In the past century, relatively most of Croatian residents bearing this family name were born in Ozalj and Karlovac. In Cerje Vivodinsko in Ozalj every ninth inhabitant had the family name Streljak.
Prevalence
About 10 people with faimily name Streljak live in Croatia today, in four households only. There were 10 of them in the middle of the past century, and their number remains constant. They are located in only four naselja i to in Karlovac (<5), Petrinja (<5), Mahicno (<5), and in Cerje Vivodinsko (<5).
Outside Croatia
Family name Streljak is present in this form only in Croatia.
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1923 in source Emigration Commission Zagreb.