In Croatia, Zilli families are predominantly Italians (from Pakrac ), rarely Croats (from Rovinj ). In the past century, relatively most of Croatian residents bearing this family name were born in Pakrac and Rovinj.
Prevalence
About 20 people with faimily name Zilli live in Croatia today, in 7 households. There were 30 of them in the middle of the past century, and their number decreased by 30 percent. They are located in only threee naselja i to in Rovinj (<10), Pakrac (<5), and in Plostine (<5).