Vonić families are Croats and they are mostly from Bosnian Posavina. In the past century, relatively most of Croatian residents bearing this family name were born in Bosanian Posavina (Bosanska Gradiska area) and in Nasice.
About 360 people with faimily name Vonić live in Croatia today, in 120 households. There were 50 of them in the middle of the past century, and their number multiplied. They are located in the most of Croatian counties, in 20 cities and 42 other places, mostly in Nova Gradiska (65), Zagreb (50), Valpovo (30), Koska in Nasice area (20), and in Ljupina (20).