Beatriz Pereira de Alvim

Beatriz Pereira de Alvim (1380–1414) was a Portuguese noblewoman, the only child of Nuno Álvares Pereira and his wife Leonor de Alvim.
On 8 November 1401, she married Afonso, Count of Barcelos, illegitimate son of king John I of Portugal. She died before her husband became Duke of Braganza.
Afonso and Beatriz had three children.