Gustin families are Croats and they are mostly from Neum (Herzegovina). In the past century, relatively most of Croatian residents bearing this family name were born in Neum, Herzegovina (Neum area) and in Metkovic. In Donji Zelenikovac in Neum (Herzegovina) every second inhabitant had the family name Gustin.
Prevalence
About 130 people with faimily name Gustin live in Croatia today, in 60 households. There were 80 of them in the middle of the past century, and their number increased by 80 percent. They are located in 10 Croatian counties, in 11 cities and 20 other places, mostly in Metkovic (30), Dubrovnik (30), Zagreb (15), Mlini in Dubrovnik area (10), and in Rijeka (10).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over ten times, the first time 1902 in source Hartmann's General List of Apartments in Zagreb.