Vojak families are Croats and they are mostly from Karlovac. In the past century, relatively most of Croatian residents bearing this family name were born in Karlovac and Samobor. In Zadobarje in Karlovac every fourth inhabitant had the family name Vojak.
Prevalence
About 210 people with faimily name Vojak live in Croatia today, in 90 households. There were 220 of them in the middle of the past century, and their number remains constant. They are located in 7 Croatian counties, in 12 cities and 14 other places, mostly in Karlovac (85), Medulin in Pula area (25), Zadobarje (25), Pula (10), and in Cerje (10).
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.