In Croatia, Greksa families are Croats by relative majority (from Backa, Vojvodina ), rarely Serbs, and . In the past century, relatively most of Croatian residents bearing this family name were born in Backa, Vojvodina and in Vukovar.
Prevalence
About 10 people with faimily name Greksa live in Croatia today, in four households only. There were 0 of them in the middle of the past century, and their number multiplied. They are located in only threee naselja i to in Ilok (<10), Vukovar (<5), and in Bapska (<5).
Outside Croatia
Family name Greksa is present in 12 countries on three continents. The family name "Greksa " is used by some 400 people in Hungary , about 80 in the United States , and small number of people in Slovakia. "Grexa " is used by some 100 people in the United States , small number in Czech Republic , and small number of people in Germany.
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.