Erstić families are Croats and they are mostly from Benkovac. In the past century, relatively most of Croatian residents bearing this family name were born in Benkovac and Rijeka.
Prevalence
About 260 people with faimily name Erstić live in Croatia today, in 90 households. There were 110 of them in the middle of the past century, and their number more than doubled. They are located in the most of Croatian counties, in 14 cities and 19 other places, mostly in Zadar (55), Sikovo in Biograd na moru area (35), Rijeka (35), Medvidja (35), and in Bulic (20).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over five times, the first time 1935 in source Faculty of Humanities University of Zagreb Alumni.