Globally, Mastil (Mastil 
) is a very rare epicene first name. More prevalently, Mastil is the last name as well as the forename.
Amy, Maureen, Stephen, Stanley, Brendan, Patrice, Pepette, Francis, Yolande, Musliana, Ambrogia, Kimberly, Valérie, Isabelle, Christian, Dominique, Yvonne, Jacqueline, Julien, Philip, Kim, Mike, Anne, Adam, Rene, Ryan, Jose, Josh, John, Noel, Megan, Bruno, Fanda, Melody, Patrik, Diohet, and Christopher