In Croatia, Ćupac families are Croats (from Jastrebarsko ). In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and Jastrebarsko.
Prevalence
Only a few people with faimily name Ćupac live in Croatia today, in two households only. There were 10 of them in the middle of the past century, and their number remains constant. They are located in two Croatian cities only, in Zagreb (<5) and Gorica Svetojanska (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1906 in source Yearbook and Directory of Literary Society of St. Jerome 1906.