In Croatia, Jedinak families are almost entirely Croats (from Nasice area ), barely Romanians (from Osijek ), and . In the past century, relatively most of Croatian residents bearing this family name were born in Nasice area and in Pleternica area.
Prevalence
About 60 people with faimily name Jedinak live in Croatia today, in 30 households. There were 80 of them in the middle of the past century, and their number decreased by 20 percent. They are only located in in 8 Croatian cities and 7 other places, mostly in Breznica Nasicka (15) and Koska (10) in Nasice area, Osijek (<10), Pozega (<10), and in Zagreb (<10).
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1942 in source Phone Directory of the Independent State of Croatia 1942.