Álvaro, 3rd Duke of Aveiro
| Álvaro of Lencastre | |
|---|---|
Coat of arms of Lencastre dukes of Aveiro | |
| 3rd Duke of Aveiro | |
| Reign | 1598 - 1626 |
| Predecessor | George, 2nd Duke of Aveiro |
| Successor | Raimundo, 4th Duke of Aveiro |
| Born | 1540 |
| Died | 1626 |
| Spouse | Juliana of Lencastre |
| Issue | George, 1st Duke of Torres Novas Afonso of Lencastre Madalena Maria Violante Peter, 5th Duke of Aveiro Louís |
| House | House of Aviz |
| Father | Afonso of Lencastre |
Álvaro of Lencastre (1540–1626) was the son of Afonso of Lencastre, second son of infante George of Lencastre, 2nd Duke of Coimbra.