Ileš families are mainly Croats and they are mostly from Donji Miholjac area , less frequently Hungarians (from Osijek ). In the past century, relatively most of Croatian residents bearing this family name were born in Osijek and Nasice.
Prevalence
About 200 people with faimily name Ileš live in Croatia today, in 100 households. There were 170 of them in the middle of the past century, and their number increased by 20 percent. They are located in the most of Croatian counties, in 20 cities and 26 other places, mostly in Osijek (45), Darda in Osijek area (20), Beli Manastir (20), Moslavina Podravska in Donji Miholjac area (15), and in Zagreb (15).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over ten times, the first time 1902 in source Hartmann's General List of Apartments in Zagreb.