Belko families are Croats and they are mostly from Zlatar area. In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and in Zlatar area.
Prevalence
About 110 people with faimily name Belko live in Croatia today, in 50 households. There were 120 of them in the middle of the past century, and their number decreased by 10 percent. They are located in 8 Croatian counties, in 9 cities and 6 other places, mostly in Zagreb (55), in Podgorje Bistricko (20) and Marija Bistrica (10) in Zlatar area, Cerik (<10), and in Rijeka (<10).
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.