João de Lemos Seixas Castelo Branco (1819–1890) was a Portuguese journalist, poet and dramatist.

Lemos was born in Peso da Régua.

He was known as "the troubadour" (in Portuguese: Trovador) in Coimbra, where he graduated in Law, thanks the publication of the poetic newspaper O Trovador (repository of poetic productions of a group of young students).

Besides João, director of that publication, were part of The Troubadour: Luís da Costa Pereira, António Xavier Rodrigues Cordeiro, José Freire de Serpa, Augusto Lima and Couto Monteiro.

[1] João collaborated with other periodicals, as exemplified by the comedy newspaper The Comedy Portuguese (in Portuguese: a Comédia Portuguesa), where he started publishing in 1888.