Surname Ualdo (Ualdo 
) , in the world, is an extremely rare family name. The surname Ualdo is characteristic of Latin America and the Caribbean, particularly Mexico, where it is an extremely rare surname, Peru, and Argentina. More prevalently, Ualdo is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Ualdo | Brazil, Argentina, United States, Mexico, Italy |
Reis, Tejada, Enchizo, Franca, Moreira, Serafim, Barreto, Barbosa, Batista, Pereira, Okajima, Carvalho, Lourenco, Oliveira, Magalhaes, Conceicao, Torres, Junior, Lucero, Rizzon, Lima, Silva, Souza, Alves, Amaro, Perez, Ramos, Goncalves, Roque, Lopez, Neuci, Filho, Macedo, Santos, Araujo, Paixao, Dutra, and Fernandes