Ileković families are Croats and they are mostly from Krapina area. In the past century, relatively most of Croatian residents bearing this family name were born in Krapina area and in Bjelovar.
Prevalence
About 200 people with faimily name Ileković live in Croatia today, in 90 households. There were 160 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 12 cities and 21 other places, mostly in Zagreb (40), Jarmina in Vinkovci area (30), Bjelovar (25), Mihovljan in Krapina area (20), and in Sandrovac in Bjelovar area (15).
Outside Croatia
Family name Ileković is present in two countries on two continents.
In the sources analysed in the project Acta Croatica so far, the name is mentioned over five times, the first time 1906 in source Yearbook and Directory of Literary Society of St. Jerome 1906.