In Croatia, Ferenaz families are Italians (from Umag ). In the past century, relatively most of Croatian residents bearing this family name were born in Umag.
Prevalence
Only a few people with faimily name Ferenaz live in Croatia today, in one household only. There were 20 of them in the middle of the past century, and their number decreased significantly. They are located in one Croatian city only, in Novigrad (<5).
Outside Croatia
Family name Ferenaz is present in 7 countries on four continents.
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 2007 in source Encyclopaedia of Croatian Surnames.