In Croatia, Rucaj families are Croats by relative majority (from Buje ), equally Italians (also from Buje ), and rarely Serbs. In the past century, relatively most of Croatian residents bearing this family name were born in Buje and in Buzet area.
Prevalence
About 10 people with faimily name Rucaj live in Croatia today, in four households only. There were 50 of them in the middle of the past century, and their number decreased significantly. They are located in only two Croatian places: in Zadar (<5) and Gornja Jagodnja in Benkovac area (<5).