In Croatia, Gjaić families are almost entirely Croats (from Hrvatska Kostajnica area ), barely Hungarians (from Daruvar area ), and . In the past century, relatively most of Croatian residents bearing this family name were born in Hrvatska Kostajnica area and in Sisak.
Prevalence
About 60 people with faimily name Gjaić live in Croatia today, in 30 households. There were 40 of them in the middle of the past century, and their number increased by 80 percent. They are located in 6 Croatian counties, in 6 cities and 7 other places, mostly in Sisak (20), Bobovac in Hrvatska Kostajnica area (20), Zagreb (<10), Zapresic (<5), and in Daruvar (<5).
Outside Croatia
Family name Gjaić is present in three countries on three continents.
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1902 in source Hartmann's General List of Apartments in Zagreb.
