In the entire world, Bitterli (Bitterli 
) is an extremely rare male forename. More frequently, Bitterli is the last name as well as the forename.
Mr, John, Jean, Judy, Timo, Till, Hans, Inge, Otto, Maria, Marco, Manon, Simon, Aline, Andre, Chris, Brian, Petra, Peter, Roger, René, Renã, Jack, Riley, Jana, Didi, Ms, Max, Cã, Liz, Luc, Jan, Jã, Urs, Marc, Mark, Anny, Axel, Beat, Karl, Kurt, Kyan, Paul, Rony, Rene, Reto, Ruth, Lars, and Denis