In Croatia, Sebastian families are Serbs. In the past century, relatively most of Croatian residents bearing this family name were born in Prelog area.
Prevalence
About 10 people with faimily name Sebastian live in Croatia today, in one household only. There were 20 of them in the middle of the past century, and their number halved. They are located in four Croatian counties, threee cities and another small place , mostly in Zagreb (<5), Sisak (<5), Garesnica (<5), and in Cavle in Rijeka area (<5).
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.