Tags: Noble.
Beatriz Pereira de Alvim (1380–1415) 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. Afonso of Braganza (1400–1460) 4th Count of Ourém and 1st Marquis of Valença had a natural son from Dona Brites de Sousa (some say they secretly married).