In the past century, relatively most of Croatian residents bearing this family name were born in Pula.
Prevalence
Only a few people with faimily name Bonasin live in Croatia today, in households. There were 20 of them in the middle of the past century, and their number halved. They are located in one Croatian city only, in Pula (<5).
Outside Croatia
Family name Bonasin (including: Bonassin , Bhonasinh ) is present in 12 countries worldwide. "Bonassin " is used by some 90 people in Italy , small number in the United States , and small number of people in Germany.
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 2007 in source Encyclopaedia of Croatian Surnames.