In Croatia, Rojac families are Croats (from Novigrad area ). In the past century, relatively most of Croatian residents bearing this family name were born in Porec and Pula.
Prevalence
About 10 people with faimily name Rojac live in Croatia today, in four households only. They are located in only threee Croatian places: in Rojci (<10), Valentici (<5) and Kastelir (<5) in Novigrad area.
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.