Jertec families are Croats and they are mostly from Novi Marof area. In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and Novi Marof.
Prevalence
About 70 people with faimily name Jertec live in Croatia today, in 30 households. There were 50 of them in the middle of the past century, and their number increased by 50 percent. They are located in 9 Croatian counties, in 9 cities and 10 other places, mostly in Varazdin (15), Ljubescica in Varazdin area (10), Zagreb (<10), Zlatar-Bistrica in Oroslavje area (<10), and in Madzarevo (<5).
Outside Croatia
Family name Jertec is present in four countries on two continents.
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.