In Croatia, Jacović families are Croats (from Karlovac ). In the past century, relatively most of Croatian residents bearing this family name were born in Karlovac.
Prevalence
About 20 people with faimily name Jacović live in Croatia today, in one household only. There were 10 of them in the middle of the past century, and their number doubled. They are located in one Croatian city only, in Zagreb (<10).
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1926 in source Emigration Commission Zagreb.