Baron of Alvaiázere
| Barony Alvaiázere | |
|---|---|
Coat of Arms of the Baron of Alvaiázere  | |
| Creation date | 6 February 1818 | 
| Created by | John VI of Portugal | 
| First holder | Manuel Vieira da Silva, 1st Baron of Alvaiázere | 
| Last holder | Miguel Sousa e Almeida, 3rd Baron of Alvaiázere | 
| Status | Extinct | 
Baron of Alvaiázere is a noble title created by King John VI of Portugal, by decree dated 6 February 1818, in favour of Manuel Vieira da Silva Borges e Abreu.