In Croatia, Kadleček families are Croats (from Osijek area ). In the past century, relatively most of Croatian residents bearing this family name were born in Pleternica area and in Osijek.
Prevalence
About 20 people with faimily name Kadleček live in Croatia today, in five households only. There were 10 of them in the middle of the past century, and their number doubled. They are located in two Croatian counties, in one city and another small place , mostly in Cepin in Osijek area (10) and Pozega (<5).