In Croatia, Zulle families are predominantly Croats (from Rijeka ), rarely Italians (also from Rijeka ). In the past century, relatively most of Croatian residents bearing this family name were born in Rijeka.
Prevalence
Only a few people with faimily name Zulle live in Croatia today, in four households only. There were 20 of them in the middle of the past century, and their number halved. They are located in only two Croatian places: in Rijeka (<5) and Paveki in Bakr area (<5).
Outside Croatia
Family name Zulle is present in 9 countries on four continents.