In Croatia, Cossi families are predominantly Croats (from Labin area ), rarely Bosniaks (from Pula ). In the past century, relatively most of Croatian residents bearing this family name were born in Labin area and in Labin area.
Prevalence
About 10 people with faimily name Cossi live in Croatia today, in two households only. There were 30 of them in the middle of the past century, and their number decreased significantly. They are located in two Croatian cities only, in Labin (<10) and Pula (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over a hundred times, the first time 1902 in source Hartmann's General List of Apartments in Zagreb.