In Croatia, Rolc families are predominantly Croats (from Kastav ), rarely Slovenes (from Rijeka ). In the past century, relatively most of Croatian residents bearing this family name were born in Rijeka.
Prevalence
Only a few people with faimily name Rolc live in Croatia today, in three households only. They are located in three Croatian cities only: in Rijeka (<5), Kastav (<5), and in Opatija (<5).
Outside Croatia
Family name Rolc (including: Rolz , Rollich and Rollic ) is present in 20 countries worldwide. "Rollic " is used by small number of people in the United States.
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1606 in source Catholic Church Parish Records.