In Croatia, Grekša families are almost entirely Croats (from Knin area ), very rarely Hungarians (from Zagreb ). In the past century, relatively most of Croatian residents bearing this family name were born in Nasice area and in Virovitica area.
Prevalence
About 30 people with faimily name Grekša live in Croatia today, in 11 households. There were 10 of them in the middle of the past century, and their number tripled. They are located in four Croatian counties and 5 other places, mostly in Zrnovnica (<10), Fericanci in Orahovica area (<10), Osijek (<5), Knin (<5), and in Cepin in Osijek area (<5).
Outside Croatia
Family name Grekša is present in 10 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.
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.