In Croatia, Bosio families are Croats (from Vrbovsko area ). In the past century, relatively most of Croatian residents bearing this family name were born in Vrbovsko area and in Karlovac.
Prevalence
Only a few people with faimily name Bosio live in Croatia today, in three households only. There were 30 of them in the middle of the past century, and their number decreased significantly. They are located in only four naselja i to in Karlovac (<5), Zagreb (<5), Brod Moravice in Vrbovsko area (<5), and in Cikovici (<5).
Outside Croatia
Family name Bosio is present in 52 countries worldwide.
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1917 in source List of Dignitaries, Officials and Public Servants of the Kingdom of Croatia-Slavonia.