Globally, Brethes (Brethes 
) is an extremely rare unknown gender first name. Much more frequently, Brethes is the last name as well as the forename.
Mr, Cathy, Cyril, Katia, Kriss, Rassa, Raoul, Roger, Reine, David, Dylan, Laura, Laure, Louis, Lucie, Lucas, Lydie, Julie, Jimmy, Herve, Martin, Marcel, Annie, Anais, Alain, Serge, Ms, Guy, Lea, Jã, Marc, Manu, Alex, Axel, Katy, Paul, Maryse, Rene, Jean, Eric, Emma, Evan, Hugo, Yves, Maria, Marie, Meiko, Sarah, Léa, and Margot