Štefanac families are Croats and they are mostly from Grabovac in Slunj area. In the past century, relatively most of Croatian residents bearing this family name were born in Slunj and Karlovac. In places Luke , Đurin Potok and Selište Drežničko in Slunj area every seventh inhabitant had the family name Štefanac.
Prevalence
About 1400 people with faimily name Štefanac live in Croatia today, in 620 households. There were 1400 of them in the middle of the past century, and their number remains constant. They are located in almost all Croatian counties, in 57 cities and 151 other places, mostly in Zagreb (245), Karlovac (145), Slunj (85), Vrbovsko (60), and in Banjsko Selo in Duga Resa area (40).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over twenty times, the first time 1902 in source Hartmann's General List of Apartments in Zagreb.