In Croatia, Ivon families are Croats (from Zadar ). In the past century, relatively most of Croatian residents bearing this family name were born in Zadar and Rijeka.
Prevalence
About 20 people with faimily name Ivon live in Croatia today, in 6 households. There were 0 of them in the middle of the past century, and their number multiplied. They are located in two Croatian cities only, in Zadar (15) and Split (<5).