Worldwide, Sostek (Sostek 
) is an extremely rare unknown gender first name. More prevalently, Sostek is the last name as well as the forename.
Ala, Michal, Andrew, Cecily, Bailey, Ronald, Dianna, Donald, Joseph, Joshua, Emily, Judith, Edward, Hilary, Olivia, Martyna, Katrina, Kenneth, Rebecca, Deborah, Juliana, Tobias, Herbert, Jutta, Brian, Ann, Amy, Ron, Dan, Mark, Alan, Anna, Anya, Kyle, Bruce, Page, Gale, Josh, Joan, Jean, Todd, Herb, Maria, Megan, Anita, Ralf, and Benjamin