In Croatia, Giusti families are Croats by relative majority (from Novigrad area ), equally Italians (also from Novigrad area ). In the past century, relatively most of Croatian residents bearing this family name were born in Porec.
Prevalence
Only a few people with faimily name Giusti live in Croatia today, in two households only. There were 20 of them in the middle of the past century, and their number halved. They are located in only threee Croatian places: in Labinci in Novigrad area (<5), Rijeka (<5), and in Vrsar in Rovinj area (<5).
Outside Croatia
Family name Giusti (including: Giustti , Giusty ) is present in 60 countries worldwide. "Giusty " is used by small number of people in the United States.
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1729 in source Catholic Church Parish Records.