In Croatia, Sušin families are Croats (from Zagreb ). In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and Dugo Selo.
Prevalence
About 10 people with faimily name Sušin live in Croatia today, in five households only. There were 20 of them in the middle of the past century, and their number halved. They are located in one Croatian city only, in Zagreb (10).
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1902 in source Hartmann's General List of Apartments in Zagreb.