Šostarec families are Croats and they are mostly from Djurdjevac. In the past century, relatively most of Croatian residents bearing this family name were born in Djurdjevac and Bjelovar.
Prevalence
About 90 people with faimily name Šostarec live in Croatia today, in 40 households. There were 10 of them in the middle of the past century, and their number multiplied. They are located in 8 Croatian counties, in 7 cities and 13 other places, mostly in Djurdjevac (30), Bjelovar (15), Ferdinandovac in Djurdjevac area (10), Rijeka (<10), and in Kostrena Sveta Lucija in Bakr area (<10).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over five times, the first time 1906 in source Yearbook and Directory of Literary Society of St. Jerome 1906.