In Croatia, Bucaj families are predominantly Croats (from Buje ), rarely Italians (also from Buje ). In the past century, relatively most of Croatian residents bearing this family name were born in Buje and in Slovenia. In Krasica in Buje every tenth inhabitant had the family name Bucaj.
Prevalence
About 10 people with faimily name Bucaj live in Croatia today, in five households only. There were 0 of them in the middle of the past century, and their number multiplied. They are located in only two naselja i to in Krasica (<10) and Buje (<5).