In Croatia, Derk families are Croats (from Cakovec ). In the past century, relatively most of Croatian residents bearing this family name were born in Cakovec and in Mursko Sredisce area.
Prevalence
About 30 people with faimily name Derk live in Croatia today, in 15 households. There were 20 of them in the middle of the past century, and their number increased by 70 percent. They are located in two Croatian counties, four cities and four other places, mostly in Zagreb (15), Cakovec (<10), Prelog (<5), Senkovec in Cakovec area (<5), and in Peklenica (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over five times, the first time 1664 in source Catholic Church Parish Records.