In Croatia, Đerki families are Croats (from Valpovo area ). In the past century, relatively most of Croatian residents bearing this family name were born in Osijek and in Valpovo area.
Prevalence
About 30 people with faimily name Đerki live in Croatia today, in 9 households. There were 30 of them in the middle of the past century, and their number remains constant. They are located in threee Croatian counties, threee cities and threee other places, mostly in Osijek (15), Bizovac in Valpovo area (<10), Grubisno Polje (<10), Nova Sarovka in Slatina area (<5), and in Slatina (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1664 in source Catholic Church Parish Records.