Sušanj families are mainly Croats and they are mostly from Ogulin , barely Italians. In the past century, relatively most of Croatian residents bearing this family name were born in Rijeka and Ogulin. In Kosi in Rijeka area every second inhabitant had the family name Sušanj.
Prevalence
About 660 people with faimily name Sušanj live in Croatia today, in 280 households. There were 660 of them in the middle of the past century, and their number remains constant. They are located in 9 Croatian counties, in 21 cities and 42 other places, mostly in Rijeka (175), Ogulin (95), Zagreb (70), Viskovo in Rijeka area (45), and in Matulji in Opatija area (45).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over ten times, the first time 1906 in source Yearbook and Directory of Literary Society of St. Jerome 1906.