Posavčević families are Croats and they are mostly from Djakovo. According to some sources they are from Budrovci near Djakovo. In the past century, relatively most of Croatian residents bearing this family name were born in Djakovo and in Nova Gradiska area.
Prevalence
About 110 people with faimily name Posavčević live in Croatia today, in 40 households. There were 50 of them in the middle of the past century, and their number doubled. They are located in 6 Croatian counties, in 9 cities and 8 other places, mostly in Djakovo (40), Tisovac in Nova Gradiska area (15), Nova Gradiska (10), Vinkovci (<10), and in Trnava in Djakovo area (<10).
Outside Croatia
Family name Posavčević is present in two countries on two continents. The family name "Posavcevic " is used by few 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 1917 in source List of Dignitaries, Officials and Public Servants of the Kingdom of Croatia-Slavonia.