Across the world, Koslik (Koslik 
) is an extremely rare unknown gender forename. More frequently, Koslik is the last name as well as the forename.
Mr, Maria, Sally, Susan, Aaron, Catia, Kelly, Peter, Ralph, David, Diana, Doris, Larry, Lukas, Jamie, Jonas, Julie, Tanya, Nance, Heike, Feliz, Martin, Hugo, Sandra, Eric, Nata, Ana, Ben, Don, Joe, Uwe, Mark, Sven, Anne, Adam, Kent, Rose, Dave, Gary, Lisa, Lori, Jose, John, Joao, Jean, Todd, Tess, Niki, and Sabine