In Croatia, Rocek families are Croats (from Koprivnica area ). In the past century, relatively most of Croatian residents bearing this family name were born in Lepoglava and in Koprivnica area.
Prevalence
About 40 people with faimily name Rocek live in Croatia today, in 20 households. There were 20 of them in the middle of the past century, and their number doubled. They are located in four Croatian counties and 5 other places, mostly in Zarovnica (15), Koprivnica (<10), Drnje in Koprivnica area (<10), Zagreb (<5), and in Pula (<5).