In Croatia, Unger families are generally Croats (from Zapresic area ), barely Albanians (from Zagreb ), and . In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and Bjelovar.
Prevalence
About 50 people with faimily name Unger live in Croatia today, in 20 households. There were 60 of them in the middle of the past century, and their number decreased by 10 percent. They are located in 7 Croatian counties, in 6 cities and four other places, mostly in Zagreb (25), Koprivnica (<10), Osijek (<10), Bjelovar (<10), and in Vukovo Selo in Zapresic area (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over five times, the first time 1906 in source Yearbook and Directory of Literary Society of St. Jerome 1906.