In all the world, Maria Adelaide (Maria Adelaide 
) is a rare feminine first name. The first name Maria Adelaide is habitual in Portugal, where it is quite a rare primarily feminine, but scarcely masculine name, Italy, where it is a rare feminine name, and France, where it is a very rare female name. Not in comparison with a country's population, the name is most common in Portugal, Brazil, and Italy. Very seldom, Maria Adelaide is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Maria Adelaide | Brazil, Italy, France, Portugal, Spain |
| maria adelaide raschini Italian philosopher (1925-1999), IT (b. 1925) |
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| maria adelaide sneider Italian mathematician (1937-1989), IT (b. 1937) |
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| maria adelaide vaggioli Italian classical archaeologist, IT |
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Dos, Vieira, Martins, Marques, Almeida, Antunes, Azevedo, Cardoso, Caetano, Pereira, Pimenta, Romanò, Ribeiro, Estevez, Adelaide, Teixeira, Ferreira, Oliveira, Rodrigues, Goncalves, Junqueira, Fernandes, Duarte, Pontes, Soares, Santos, Vaz, Melo, Cruz, Page, Reis, Lima, Urze, Matos, Silva, Abreu, Dos Santos, Costa, Peres, Pinto, Pires, Rocha, Gomes, Leite, Lenti, Lopes, Nunes, Mendes, Knapp, and Teixeira Oliveira