Baron of Alvaiázere

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Baron of Alvaiázere was a Portuguese noble title created by King John VI on 6 February 1818, granted to Manuel Vieira da Silva Borges e Abreu. The first holder was Manuel Vieira da Silva, 1st Baron of Alvaiázere, and the last was Miguel Sousa e Almeida, 3rd Baron of Alvaiázere. The title is now extinct.