In all the world, Schlum (Schlum 
) is an extremely rare unknown gender first name. Much more frequently, Schlum is the last name as well as the forename.
Ben, Wendy, Marian, Marion, Claire, Ronald, Regina, Denise, Daniel, Janeen, Joseph, Thomas, Nicole, Harlan, Matthew, Maureen, Charles, Babette, Katrina, Kenneth, Raymond, Timothy, Vince, David, Deeda, Derek, Kip, Ray, Jan, Jay, Tom, Ted, Dawn, John, June, Nola, Nicolas, Maria, Alice, April, Aaron, Chuck, Carly, Brian, Brett, Karen, Kevin, Roger, Steve, and Margaret