In Croatia, Antunčić families are Croats (from Sisak ). In the past century, relatively most of Croatian residents bearing this family name were born in Sisak.
Prevalence
Only a few people with faimily name Antunčić live in Croatia today, in two households only. They are located in only one small Croatian place, in Preloscica (<5).
Outside Croatia
Family name Antunčić is present in this form only in Croatia.