In Croatia, Ružaj families are Croats (from Cakovec ). In the past century, relatively most of Croatian residents bearing this family name were born in Cakovec.
Prevalence
Only a few people with faimily name Ružaj live in Croatia today, in four households only. They are located in one Croatian city only, in Cakovec (<10).
Outside Croatia
Family name Ružaj (including: Ruzaj , Ruzai ) is present in 9 countries on four continents. The family name "Ruzaj " is used by few people in the United States.