In Croatia, Kozlevac families are generally Croats (from Buje ), very rarely Italians (also from Buje ). In the past century, relatively most of Croatian residents bearing this family name were born in Slovenia and in Buje.
Prevalence
About 20 people with faimily name Kozlevac live in Croatia today, in 7 households. They are located in only four naselja i to in Kastel (<10), Buje (<10), Pula (<5), and in Umag (<5).
Outside Croatia
Family name Kozlevac is present in this form only in Croatia.