In Croatia, Borelli families are Croats with origins from Zadar. Borelli is an old noble Croatian family present since the 16th century.
Prevalence
Only a few people with faimily name Borelli live in Croatia today, in two households only. There were 0 of them in the middle of the past century, and their number multiplied. They are located in three Croatian cities only: in Zagreb (<5), Zadar (<5), and in Rovinj (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1902 in source Hartmann's General List of Apartments in Zagreb.