Hrenek families are Croats and they are mostly from Donja Stubica. In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and Donja Stubica. In Kozlikovo in Jastrebarsko area every eighth inhabitant had the family name Hrenek.
Prevalence
About 60 people with faimily name Hrenek live in Croatia today, in 30 households. There were 50 of them in the middle of the past century, and their number increased by 20 percent. They are located in 10 Croatian counties, in 12 cities and 6 other places, mostly in Zagreb (15), Donja Stubica (15), Slavonski Brod (<10), Oroslavje (<10), and in Kozlikovo in Jastrebarsko area (<10).
Outside Croatia
Family name Hrenek (including: Chrenek , Cherenek ) is present in 9 countries on four continents. "Cherenek " is used by small number of people in the United States and small number in Colombia.
In the sources analysed in the project Acta Croatica so far, the name is mentioned over five times, the first time 1683 in source Catholic Church Parish Records.