In Croatia, Cupač families are Croats by relative majority (from Zagreb ), rarely Macedonians (from Klanjec ), and . In the past century, relatively most of Croatian residents bearing this family name were born in Novska.
Prevalence
Only a few people with faimily name Cupač live in Croatia today, in three households only. They are located in three Croatian cities only: in Zagreb (<5), Korlat (<5), and in Dol Klanjecki (<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.