In Croatia, Boraska families are Croats (from Split ). In the past century, relatively most of Croatian residents bearing this family name were born in Split.
Prevalence
About 10 people with faimily name Boraska live in Croatia today, in 8 households. There were 10 of them in the middle of the past century, and their number remains constant. They are located in two Croatian cities only, in Split (10) and Zagreb (<5).
Outside Croatia
Family name Boraska (including: Borrasca , Borasca ) is present in 11 countries on four continents. The family name "Boraska " is used by few people in France and few people in the United States.