In Croatia, Derkos families are Croats (from Virovitica area ). In the past century, relatively most of Croatian residents bearing this family name were born in Karlovac and Zagreb.
Prevalence
About 10 people with faimily name Derkos live in Croatia today, in 7 households. There were 30 of them in the middle of the past century, and their number decreased significantly. They are located in four Croatian counties, threee cities and four other places, mostly in Virovitica (<5), Zagreb (<5), Sesvete (<5), Karlovac (<5), and in Suhopolje in Virovitica area (<5).
Outside Croatia
Family name Derkos is present in 8 countries on three continents. The family name "Derkos " is used by some 60 people in the United States. "Derkosh " is used by small number of people in the United States.
In the sources analysed in the project Acta Croatica so far, the name is mentioned over five times, the first time 1917 in source List of Dignitaries, Officials and Public Servants of the Kingdom of Croatia-Slavonia.