In Croatia, Gjerek families are Croats (from Koprivnica ). In the past century, relatively most of Croatian residents bearing this family name were born in Varazdin and Zagreb.
Prevalence
About 10 people with faimily name Gjerek live in Croatia today, in 8 households. There were 10 of them in the middle of the past century, and their number remains constant. They are located in 6 Croatian counties and threee other places, mostly in Koprivnica (<10), Zagreb (<5), Drnje in Koprivnica area (<5), Varazdin (<5), and in Split (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over ten times, the first time 1929 in source Emigration Commission Zagreb.