In Croatia, Dragustin families are Croats (from Serbia ). In the past century, relatively most of Croatian residents bearing this family name were born in Serbia.
Prevalence
Only a few people with faimily name Dragustin live in Croatia today, in one household only. There were 10 of them in the middle of the past century, and their number decreased significantly. They are located in one Croatian city only, in Rijeka (<5).
Outside Croatia
Family name Dragustin is present in this form only in Croatia.
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.