In Croatia, Zelen families are generally Croats (from Varazdin area ), very rarely Serbs. In the past century, relatively most of Croatian residents bearing this family name were born in Dubrovnik and Varazdin.
Prevalence
About 50 people with faimily name Zelen live in Croatia today, in 18 households. There were 60 of them in the middle of the past century, and their number decreased by 20 percent. They are located in four Croatian counties, threee cities and 6 other places, mostly in Sudjuradj (15), Sracinec in Varazdin area (10), Dubrovnik (<10), Zagreb (<5), and in Split (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1930 in source Emigration Commission Zagreb.