Throughout the world, Demasy (Demasy 
) is a very rare masculine forename. The given name Demasy is characteristic of Southern Asia, particularly India, where it is an extremely rare male name. More prevalently, Demasy is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Demasy | Belgium, India, France, United States, Argentina |
Mr, Carine, Claude, Kelley, Romain, Dennis, Daniel, Laurie, Louise, Ludwig, Javier, Joseph, Nadine, Emilie, Hugues, Mahmoud, Anthony, Colette, Bernard, Patrick, Josette, Jessica, Carole, Arthur, Alexis, Michel, Max, Marc, Alan, Anna, Anne, Rene, Dono, Joel, Nada, Erik, Evelyne, Maric, Annie, Aimee, Chris, Bruno, Roger, David, Linda, Loïc, Jagan, Marina, Alain, and Vincent