In Croatia, Koši families are predominantly Croats (from Zlatar area ), rarely Albanians (from Kosovo ), and very rarely Serbs. In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and in Zlatar area.
Prevalence
About 30 people with faimily name Koši live in Croatia today, in 13 households. There were 40 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 four other places, mostly in Zagreb (<10), Krapina Selo in Zlatar area (<10), Virovitica (<5), Sesvete (<5), and in Samobor (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over five times, the first time 1902 in source Hartmann's General List of Apartments in Zagreb.