Janjetović families are mainly Serbs and they are mostly from Bosnian Posavina , whereas often Croats (from Hrvatska Kostajnica area ). In the past century, relatively most of Croatian residents bearing this family name were born in Bosanian Posavina (Bosanski Novi area) and in Zagreb.
Prevalence
About 80 people with faimily name Janjetović live in Croatia today, in 40 households. There were 60 of them in the middle of the past century, and their number increased by 40 percent. They are located in 9 Croatian counties, in 12 cities and 8 other places, mostly in Zagreb (20), Velika Gorica (15), Slavonski Brod (15), Vukovar (15), and in Sisak (10).
Outside Croatia
At least one family with this surname emigrated from Croatia to the United States. Family name Janjetović is present in 12 countries on three continents. The family name "Janjetovic " is used by small number of people in the United States , small number in Norway , and small number of people in the Netherlands.
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1917 in source List of Dignitaries, Officials and Public Servants of the Kingdom of Croatia-Slavonia.