In Croatia, Koči families are mainly Croats (from Daruvar area ), less frequently Czechs (also from Daruvar area ), and very rarely Hungarians (from Bakar ). In the past century, relatively most of Croatian residents bearing this family name were born in Daruvar area and in Pakrac.
Prevalence
About 40 people with faimily name Koči live in Croatia today, in 18 households. There were 50 of them in the middle of the past century, and their number decreased by 20 percent. They are located in 7 Croatian counties, in 6 cities and four other places, mostly in Koncanica in Daruvar area (20), Daruvar (<10), Bakar (<10), Pakrac (<5), and in Malinska on the Island of Krk (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over forty times, the first time 1902 in source Hartmann's General List of Apartments in Zagreb.