Beatriz Pereira de Alvim (1380–1414) was a Portuguese noblewoman, the only child of Nuno Álvares Pereira and his wife Leonor de Alvim.

[1] On 8 November 1401, she married Afonso, Count of Barcelos, illegitimate son of king John I of Portugal.

[2] She died before her husband became Duke of Braganza.

Afonso and Beatriz had three children.

This biography of a member of the Portuguese royal family is a stub.