In Croatia, Rojc families are generally Croats (from Varazdin area ), very rarely Slovenes (from Pula ), and barely Serbs. In the past century, relatively most of Croatian residents bearing this family name were born in Varazdin and Zagreb.
Prevalence
About 70 people with faimily name Rojc live in Croatia today, in 40 households. There were 80 of them in the middle of the past century, and their number decreased by 0 percent. They are located in 8 Croatian counties, in 10 cities and 8 other places, mostly in Zagreb (20), Sracinec in Varazdin area (10), Varazdin (<10), Sisak (<5), and in Petrijanec in Varazdin area (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over twenty times, the first time 1729 in source Catholic Church Parish Records.