Radek families are Croats and they are mostly from Cakovec (ili Mihovljana pored Čakovca). According to some sources they are from Czechia. In the past century, relatively most of Croatian residents bearing this family name were born in Cakovec and Samobor. In Savršćak in Samobor every seventh inhabitant had the family name Radek.
Prevalence
About 210 people with faimily name Radek live in Croatia today, in 70 households. There were 140 of them in the middle of the past century, and their number increased by 50 percent. They are located in 6 Croatian counties, in 6 cities and 25 other places, mostly in Cakovec (70), Samobor (20), in Zasadbreg (20) and Senkovec (15) in Cakovec area, and in Savrscak (10).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over ten times, the first time 1906 in source Yearbook and Directory of Literary Society of St. Jerome 1906.