In Croatia, Gerštmajer families are Hungarians (from Beli Manastir area ). In the past century, relatively most of Croatian residents bearing this family name were born in Beli Manastir area and in Backa, Vojvodina.
Prevalence
About 10 people with faimily name Gerštmajer live in Croatia today, in five households only. There were 10 of them in the middle of the past century, and their number remains constant. They are located in only threee naselja i to in Zmajevac (<10), Knezevi Vinogradi (<5) and Batina (<5) in Beli Manastir area.