In all the world, Mastros (Mastros 
) is an extremely rare unknown gender forename. Much more frequently, Mastros is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Mastros | South Africa, Australia, United States, Canada, Brazil |
Con, Sarah, Sonia, Steve, Snoya, Alice, Allen, Caryl, Cathy, Brian, Mitch, Bryan, Kelly, Keith, David, Dilma, Leesy, Lynne, James, Jason, Nancy, Karen, Ellen, Misty, Mandy, Dan, Don, Marc, Mark, Mike, Sara, Pana, Paul, Ruth, Megan, Greg, Lisa, Jose, John, Juan, Judy, Nick, Eric, Zina, Maria, Leah, and Helen