Across the world, Mastio (Mastio 
) is an extremely rare unisex first name. Predominantly, Mastio is the last name as well as the forename.
Mr, Emma, Hery, Ivan, Maria, Marie, Mario, Marta, Marco, Simon, Susan, Sonia, Steve, Aline, Alain, Andre, Anwar, Cindy, Brett, Bruno, Kevin, Paola, Eric, Jeff, Jean, Joel, Ms, Ben, Noa, Mark, Mike, Alex, Aldo, Anna, Atis, Carl, Paolo, Curt, Paul, Rita, Dave, Dino, Gail, Gian, Lito, Lori, Luca, John, Kyle, and Piero