Zjačić families are mainly Croats and they are mostly from Sibenik , often Serbs. In the past century, relatively most of Croatian residents bearing this family name were born in Sibenik and Benkovac. In Donji Babin Potok in Otocac area every eighth inhabitant had the family name Zjačić.
Prevalence
About 80 people with faimily name Zjačić live in Croatia today, in 40 households. There were 120 of them in the middle of the past century, and their number decreased by 30 percent. They are located in 9 Croatian counties, in 11 cities and 13 other places, mostly in Sibenik (25), Kolarevo Selo in Bjelovar area (10), Zagreb (<10), Split (<10), and in Kastav (<5).
Outside Croatia
Family name Zjačić is present in 7 countries on three continents.
In the sources analysed in the project Acta Croatica so far, the name is mentioned over ten times, the first time 1935 in source Faculty of Humanities University of Zagreb Alumni.