Črnko families are usually Croats and they are mostly from Velika Gorica , rarely Slovenes. In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and Velika Gorica.
Prevalence
About 130 people with faimily name Črnko live in Croatia today, in 50 households. There were 140 of them in the middle of the past century, and their number decreased by 10 percent. They are located in 6 Croatian counties, in 6 cities and 9 other places, mostly in Busevec (40), Zagreb (20), Brezovica (15), Velika Gorica (10), and in Cickovina in Ludbreg area (10).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over ten times, the first time 1906 in source Yearbook and Directory of Literary Society of St. Jerome 1906.