In Croatia, Dečak families are Croats (from Virovitica area ). In the past century, relatively most of Croatian residents bearing this family name were born in Virovitica area and in Virovitica.
Prevalence
About 20 people with faimily name Dečak live in Croatia today, in 15 households. There were 50 of them in the middle of the past century, and their number decreased significantly. They are located in only five Croatian places: in Zagreb (<10), Virovitica (<10), Detkovac in Virovitica area (<5), and in Cugovec (<5) and Tucenik (<5) in Vrbovec area.
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.