In Croatia, Deči families are generally Croats (from Zagreb ), rarely Slovenes. In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and Karlovac.
Prevalence
Only a few people with faimily name Deči live in Croatia today, in five households only. There were 0 of them in the middle of the past century, and their number multiplied. They are located in two Croatian cities only, in Zagreb (<10) and Novaki in Samobor area (<5).
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.