Šostarić families are Croats and they are mostly from Koprivnica area. In the past century, relatively most of Croatian residents bearing this family name were born in Koprivnica and Bjelovar.
Prevalence
About 60 people with faimily name Šostarić live in Croatia today, in 30 households. There were 30 of them in the middle of the past century, and their number doubled. They are located in 6 Croatian counties, in 7 cities and 21 other places, mostly in Rusevac (10), Koprivnica (<10), Novi Vinodolski (<10), and in Rovisce (<10) and Jabuceta (<10) in Bjelovar area.
In the sources analysed in the project Acta Croatica so far, the name is mentioned over fifty times, the first time 1669 in source Catholic Church Parish Records.