In Croatia, Ćujo families are predominantly Serbs, rarely Croats (from Vukovar ). In the past century, relatively most of Croatian residents bearing this family name were born in Knin area and in Vinkovci. In Ervenik in Knin area every fiftieth inhabitant had the family name Ćujo.
Prevalence
About 20 people with faimily name Ćujo live in Croatia today, in 9 households. They are only located in four Croatian cities and two other places, mostly in Mirkovci (<10), Vukovar (<10), Zagreb (<10), Velika Gorica (<5), and in Ervenik in Knin area (<5).