In the entire world, Stelz (Stelz 
) is an extremely rare unknown gender forename. Much more prevalently, Stelz is the last name as well as the forename.
Mr, Elke, Eric, Hank, Vera, Vlad, Ingo, Maria, Marie, Scott, Tina, Chris, Brian, Karen, Klaus, Patty, Peter, Ralph, Diane, Laura, Lucia, Betty, Tara, Jens, John, Ms, Ava, Ron, Jim, Flo, Ute, Mark, Maik, Anna, Cara, Beth, Bill, Bibi, Karl, Kati, Kyle, Robt, Dale, Dirk, Greg, Jack, Janet, and James