In Croatia, Apollonio families are predominantly Italians (from Rovinj ), rarely Croats (also from Rovinj ). In the past century, relatively most of Croatian residents bearing this family name were born in Rovinj and Pula.
Prevalence
About 20 people with faimily name Apollonio live in Croatia today, in 6 households. There were 70 of them in the middle of the past century, and their number decreased significantly. They are located in two Croatian cities only, in Rovinj (15) and Zambratija (<5).
Outside Croatia
Family name Apollonio is present in 25 countries worldwide. "Appollonio " is used by some 90 people in Italy , small number in the United States , and small number of people in Czech Republic.
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1936 in source Emigration Commission Zagreb.