In Croatia, Agreš families are Croats (from the Island of Krk ). In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and Rijeka.
Prevalence
About 20 people with faimily name Agreš live in Croatia today, in 8 households. There were 20 of them in the middle of the past century, and their number remains constant. They are located in 6 Croatian counties, in 6 cities and another small place , mostly in Zagreb (<10), Pula (<5), Omisalj on the Island of Krk (<5), Novaki Scitarjevski (<5), and in Rijeka (<5).