Krnjajić families are mainly Serbs and they are mostly from Hrvatska Kostajnica area , whereas often Croats (from Bosnian Posavina ). In the past century, relatively most of Croatian residents bearing this family name were born in Hrvatska Kostajnica area and in Glina. In Melinovac in Obrovac area every fifth inhabitant had the family name Krnjajić.
Prevalence
About 120 people with faimily name Krnjajić live in Croatia today, in 70 households. There were 200 of them in the middle of the past century, and their number decreased by 40 percent. They are located in the most of Croatian counties, in 19 cities and 31 other places, mostly in Borovo in Vukovar area (15), Petrinja (10), Sisak (10), Nova Gradiska (10), and in Rijeka (<10).
Outside Croatia
Family name Krnjajić is present in 11 countries on three continents. The family name "Krnjajic " is used by small number of people in the United States.
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.
