In Croatia, Rošćak families are Croats (from Samobor ). In the past century, relatively most of Croatian residents bearing this family name were born in Samobor.
Prevalence
Only a few people with faimily name Rošćak live in Croatia today, in one household only. There were 0 of them in the middle of the past century, and their number remains constant. They are located in only one small Croatian place, in Farkasevec Samoborski (<5).