Globally, Grätzer (Grätzer 
) is an extremely rare unknown gender first name. Much more frequently, Grätzer is the last name as well as the forename.
Mike, Debora, Julian, Theres, Thomas, Tobias, Nadine, Esther, Birgit, Michael, Claudia, Patrick, Ricardo, Daniela, Marianne, Beatrice, Wolfgang, Susanne, Christian, Carlos, Mischa, Sepp, Beno, Dani, Dina, Hans, Mario, Simon, Stefan, Albin, Klaus, Peter, Ruedi, Jonas, Heiko, Martin, Marcel, Benny, and Karl-Heinz