In Croatia, Kulej families are Croats (from Virovitica area ). In the past century, relatively most of Croatian residents bearing this family name were born in Bjelovar and in Virovitica area.
Prevalence
About 30 people with faimily name Kulej live in Croatia today, in 13 households. There were 10 of them in the middle of the past century, and their number tripled. They are located in four Croatian counties and two other places, mostly in Virovitica (<10), Zagreb (<5), Bjelovar (<5), Janja Lipa (<5), and in Jugovo Polje in Virovitica area (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 2007 in source Encyclopaedia of Croatian Surnames.