In Croatia, Prejac families are Croats (from Zagreb ). In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb.
Prevalence
Only a few people with faimily name Prejac live in Croatia today, in two households only. There were 10 of them in the middle of the past century, and their number decreased significantly. They are located in one Croatian city only, in Zagreb (<5).
Outside Croatia
Family name Prejac is present in four countries on three continents. The family name "Prejac " is used by few people in the United States.
In the sources analysed in the project Acta Croatica so far, the name is mentioned over five times, the first time 1902 in source Hartmann's General List of Apartments in Zagreb.