Worldwide, De Mario (Demario 
, De Mario 
) is quite a rare boy's first name. The forename De Mario is characteristic of Jamaica, where it is quite a rare male name, the United States, where it is a rare male name, and Brazil. Also, De Mario is the last name as well as the forename.
La, Marcy, Mauro, Mirta, Mirko, Bruno, Pablo, Ruben, Danny, Diane, Lucas, Jorge, Julio, Norma, Noemi, Erica, Frank, Oscar, Manuel, Alexis, Alicia, Andrew, Mario, Angela, Maria, Irma, Ana, Ada, Ugo, Mena, Sara, Anna, Anne, Carl, Bepi, Paul, Rosa, Rose, Dawn, Dora, Lino, Lisa, Luca, John, Juan, Enzo, Vito, Irgo, and Arthur