Jerak families are Croats and they are mostly from Zadar area. In the past century, relatively most of Croatian residents bearing this family name were born in Zadar and in Zadar area.
Prevalence
About 110 people with faimily name Jerak live in Croatia today, in 50 households. There were 120 of them in the middle of the past century, and their number decreased by 10 percent. They are located in 7 Croatian counties, in 8 cities and threee other places, mostly in Debeljak in Zadar area (75), Zadar (20), Sukosan in Zadar area (10), Ogulin (<10), and in Varazdin (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 2007 in source Encyclopaedia of Croatian Surnames.