In Croatia, Sasso families are Croats (from Trogir ). In the past century, relatively most of Croatian residents bearing this family name were born in Split and Trogir.
Prevalence
About 20 people with faimily name Sasso live in Croatia today, in 10 households. There were 30 of them in the middle of the past century, and their number decreased by 20 percent. They are located in four Croatian counties, in 7 cities, mostly in Split (15), Zagreb (<5), Rijeka (<5), Trogir (<5), and in Sibenik (<5).
Outside Croatia
At least one family with this surname emigrated from Croatia to the United States. Family name Sasso is present in 72 countries worldwide. The family name "Sasso " is used by some 10000 people in Italy , about 7000 in Brazil , and some 4000 people in the United States.
In the sources analysed in the project Acta Croatica so far, the name is mentioned over five times, the first time 1906 in source Yearbook and Directory of Literary Society of St. Jerome 1906.