In Croatia, Czerny families are predominantly Croats (from Opatija ), rarely Serbs. In the past century, relatively most of Croatian residents bearing this family name were born in Rijeka.
Prevalence
About 10 people with faimily name Czerny live in Croatia today, in five households only. There were 0 of them in the middle of the past century, and their number multiplied. They are located in only four naselja i to in Opatija (<10), Rijeka (<5), Matulji in Opatija area (<5), and in Lukezi in Rijeka area (<5).
Outside Croatia
Family name Czerny is present in 30 countries worldwide.
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1917 in source List of Dignitaries, Officials and Public Servants of the Kingdom of Croatia-Slavonia.