Family name Valladão (Valladão 
) , throughout the world, is a very rare surname. The surname Valladão is characteristic of Brazil, where it is a very rare surname, and the United States, where it is an extremely rare surname.
| VARIANT | COUNTRY |
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| Valladão | Brazil, United States |
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alfredo de vilhena valladão Brazilian journalist and lawyer, BR (b. 1873) |
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haroldo valladão brazilian jurist (1901-1987) (b. 1901) |
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| alfredo valladão (b. 1953) |
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| gustavo moraes ramos valladão researcher |
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| carlos alberto amaral valladão researcher |
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Ana, José, Jorge, Joana, João, Nadja, Edson, Zilma, Marina, Marisa, Marcos, Manuel, Manoel, Magali, Sandra, Samuel, Sergio, André, Arthur, Amanda, Carlos, Camila, Luana, Lucas, Lucio, Lucia, Bel, Geo, Caio, Rosa, Davi, Lara, Luis, Luiz, Jose, Iris, Cintia, Yuri, Marco, Mauro, Carla, Carol, Bruno, Paulo, Pablo, Pedro, Renan, Diego, Maria, and Kátia