Around the world, Mastos (Mastos 
) is an extremely rare unknown gender given name. Much more frequently, Mastos is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Mastos | Australia, Philippines, Dominican Republic, United States, Greece |
Pam, Cindy, Kathy, Kayla, Peter, Ruben, David, Donna, Louis, Janet, Julie, Tammy, Nancy, Nadia, Helen, Sergio, Steven, Andrew, Kostas, Pamela, Robert, Renato, Craig, Chris, Amber, Allan, Ted, Mary, Myra, Curt, Paul, Rose, Ruth, Rudy, Dean, Jose, George, Tony, Nick, Edna, Flor, Ioan, Sally, Sarah, Shawn, Susan, Steve, Scott, Todd, and Jessie