In Croatia, Režak families are predominantly Croats (from Banja Luka Region (Bosnia) ), rarely Ukrainians (from Split ). In the past century, relatively most of Croatian residents bearing this family name were born in Banja Luka Region, Bosnia (Banja Luka area).
Prevalence
Only a few people with faimily name Režak live in Croatia today, in two households only. They are located in only threee Croatian places: in Drljaca in Hrvatska Kostajnica area (<5), Split (<5), and in Cetvrtkovac in Hrvatska Kostajnica area (<5).