Ernečić families are Croats and they are mostly from Ivanec area. In the past century, relatively most of Croatian residents bearing this family name were born in Ivanec area and in Koprivnica.
Prevalence
About 80 people with faimily name Ernečić live in Croatia today, in 30 households. There were 40 of them in the middle of the past century, and their number doubled. They are only located in in 7 Croatian cities and 6 other places, mostly in Slivarsko in Ivanec area (20), Koprivnica (20), Ivanec (<10), Varazdin (<10), and in Zagreb (<10).
Outside Croatia
Family name Ernečić is present in this form only in Croatia.
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.