In Croatia, Koželj families are generally Croats (from Ozalj area ), very rarely Slovenes (from Slovenia ). In the past century, relatively most of Croatian residents bearing this family name were born in Slovenia and in Zagreb.
Prevalence
About 20 people with faimily name Koželj live in Croatia today, in 9 households. There were 50 of them in the middle of the past century, and their number decreased significantly. They are located in 8 Croatian counties and 5 other places, mostly in Petrinja (<5), Jurovski Brod in Ozalj area (<5), Zagreb (<5), Gornja Dubrava in Cakovec area (<5), and in Kohanjac in Ozalj area (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over five times, the first time 1917 in source List of Dignitaries, Officials and Public Servants of the Kingdom of Croatia-Slavonia.