In Croatia, Bonja families are Croats (from Dugi (Long) Island ). In the past century, relatively most of Croatian residents bearing this family name were born in Zadar and on Dugi, Long Island.
Prevalence
About 20 people with faimily name Bonja live in Croatia today, in 7 households. There were 20 of them in the middle of the past century, and their number remains constant. They are located in only threee Croatian places: in Sali on Dugi (Long) Island (10), Zadar (<5), and in Zdrelac on the Island of Pasman (<5).