In the entire world, Sieglitz (Sieglitz 
) is an extremely rare unknown gender first name. Much more prevalently, Sieglitz is the last name as well as the forename.
Mr, Sanny, Sonia, Andre, Antje, Assis, Chris, Carol, Betty, Bruna, Kelly, Paula, Pedro, Denny, David, Laura, Laisa, Linda, Lucas, James, Hardy, Frank, Megan, Marly, Marie, Maria, Ana, Ros, Lea, Uwe, Mara, Mona, Alan, Anni, Cody, Karl, Wanda, Ruth, Luis, Jade, John, Tais, Troy, Nina, Elen, Edit, Vera, Olga, Greg, and Marian