Birtić 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 Slavonski Brod.
Prevalence
About 300 people with faimily name Birtić live in Croatia today, in 110 households. There were 330 of them in the middle of the past century, and their number decreased by 10 percent. They are located in the most of Croatian counties, in 12 cities and 32 other places, mostly in Gorjani (50) and Stari Perkovci (40) in Djakovo area, Osijek (30), Slavonski Brod (20), and in Zagreb (20).
Outside Croatia
Family name Birtić is present in 9 countries on three continents. The family name "Birtic " is used by some 100 people in France , about 60 in the United States , and small number of people in Australia.
In the sources analysed in the project Acta Croatica so far, the name is mentioned over ten times, the first time 1906 in source Yearbook and Directory of Literary Society of St. Jerome 1906.
