In Croatia, Iveša families are generally Croats (from Pula area ), very rarely Montenegrins, and . In the past century, relatively most of Croatian residents bearing this family name were born in Pula and in Pula area.
Prevalence
About 30 people with faimily name Iveša live in Croatia today, in 15 households. There were 90 of them in the middle of the past century, and their number decreased significantly. They are located in threee Croatian counties, threee cities and threee other places, mostly in Pula (10), in Banjole (<5) and Premantura (<5) in Pula area, Rijeka (<5), and in Slavonski Brod (<5).
Outside Croatia
Family name Iveša (including: Ivesa , Ivessa and Ivesha ) is present in 8 countries on four continents.
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1917 in source List of Dignitaries, Officials and Public Servants of the Kingdom of Croatia-Slavonia.