Jelak families are Croats and they are mostly from Krizevci area. In the past century, relatively most of Croatian residents bearing this family name were born in Krizevci area and in Koprivnica. In Brezje Miholečko in Krizevci area every fourth inhabitant had the family name Jelak.
Prevalence
About 190 people with faimily name Jelak live in Croatia today, in 80 households. There were 240 of them in the middle of the past century, and their number decreased by 20 percent. They are located in 9 Croatian counties, in 14 cities and 34 other places, mostly in Koprivnica (20), Krizevci (15), Brezje Miholecko in Krizevci area (15), Milicani in Koprivnica area (15), and in Zagreb (10).
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 2007 in source Encyclopaedia of Croatian Surnames.