In all the world, Schlaepfer (Schlaepfer 
) is an extremely rare unknown gender first name. Much more frequently, Schlaepfer is the last name as well as the forename.
Mr, Karl, Kurt, Pien, Phil, Ralf, Rosa, Rolf, Rene, Reto, Rico, Ruth, Rudy, Ryan, Dean, Dave, Greg, Lars, Josh, John, Joan, Joao, Bill, Eric, Carl, Anna, Ms, Max, Ana, Ben, Kim, Pam, Ron, Gea, Lea, Lis, Jan, Joe, Ted, Ivo, Urs, Marc, Mary, Matt, Sila, Stã, Alex, Anne, and Emma