In Croatia, Derossi families are almost entirely Croats (from Crikvenica ), very rarely Italians (from Labin ). In the past century, relatively most of Croatian residents bearing this family name were born in Rijeka and Pula. In Ripenda Kosi in Labin every fiftieth inhabitant had the family name Derossi.
Prevalence
About 40 people with faimily name Derossi live in Croatia today, in 12 households. There were 10 of them in the middle of the past century, and their number multiplied. They are located in four Croatian counties, in 7 cities, mostly in Crikvenica (20), Lindar (<10), Pula (<5), Vinez (<5), and in Cikovici (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1906 in source Yearbook and Directory of Literary Society of St. Jerome 1906.