In Croatia, Krutijak families are predominantly Croats (from Banja Luka Region (Bosnia) ), rarely Serbs. 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 Krutijak live in Croatia today, in three households only. They are located in only two Croatian places: in Sisak (<10) and Brdjani Cesta in Hrvatska Kostajnica area (<5).
Outside Croatia
Family name Krutijak is present in this form only in Croatia.