Ervačić families are Croats and they are mostly from Djakovo area. In the past century, relatively most of Croatian residents bearing this family name were born in Djakovo area and in Djakovo.
Prevalence
About 80 people with faimily name Ervačić live in Croatia today, in 20 households. There were 50 of them in the middle of the past century, and their number increased by 60 percent. They are located in four Croatian counties, in 6 cities and four other places, mostly in Semeljci in Djakovo area (55), Djakovo (<10), Koritna in Djakovo area (<10), Osijek (<5), and in Svetonedeljski Breg in Samobor area (<5).
Outside Croatia
Family name Ervačić 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.