In Croatia, Rizzi families are generally Croats (from Cazma area ), rarely Italians. In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and in Duga Resa area.
Prevalence
About 20 people with faimily name Rizzi live in Croatia today, in 11 households. There were 20 of them in the middle of the past century, and their number remains constant. They are only located in in 6 Croatian cities and four other places, mostly in Zagreb (<10), Karlovac (<5), Dubrovnik (<5), Duga Resa (<5), and in Split (<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.