In Croatia, Ondrašek families are Croats (from Djakovo ). In the past century, relatively most of Croatian residents bearing this family name were born in Djakovo and Zagreb.
Prevalence
About 20 people with faimily name Ondrašek live in Croatia today, in 8 households. There were 10 of them in the middle of the past century, and their number doubled. They are located in only four naselja i to in Djakovo (15), Maretic in Novi Marof area (<10), Zagreb (<5), and in Vukovar (<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.