In Croatia, Grejić families are generally Croats (from Zupanja area ), very rarely Italians (from Osijek ). In the past century, relatively most of Croatian residents bearing this family name were born in Zupanja area and in Bosanian Posavina (Modrica area).
Prevalence
About 30 people with faimily name Grejić live in Croatia today, in 11 households. There were 10 of them in the middle of the past century, and their number tripled. They are located in 7 Croatian counties and 5 other places, mostly in Osijek (10), Zagreb (<10), Metkovic (<5), Garbina (<5), and in Dvor in Hrvatska Kostajnica area (<5).
Outside Croatia
Family name Grejić is present in this form only in Croatia.