In Croatia, Kočo families are predominantly Croats (from East Herzegovine ), rarely Bosniaks (from Porec ). In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and in Middle Bosnia (Sarajevo area). In Gomiljani in East Herzegovina every third inhabitant had the family name Kočo.
Prevalence
About 10 people with faimily name Kočo live in Croatia today, in 6 households. There were 0 of them in the middle of the past century, and their number multiplied. They are located in four Croatian counties, four cities and threee other places, mostly in Zagreb (<10), Dubrovnik (<5), Kadumi (<5), Rijeka (<5), and in Sesvete (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over twenty times, the first time 1902 in source Hartmann's General List of Apartments in Zagreb.