| Nuno Alvares Pereira|
Nuno Alvares Pereira
1415, Chaves, Portugal
| Beatriz de|
Leonor de Alvim
| Afonso, Duke of Braganza (m. 1401–1415)|
Isabel of Barcelos, Afonso of Braganza, 1st Marquis of Valenca
Isabella of Portugal, Queen of Castile, Beatrice, Duchess of Viseu
Nuno Alvares Pereira, John I of Portugal, Isabella of Portugal - Queen of, Philippa of Lancaster, Henry the Navigator
Beatriz Pereira de Alvim Wikipedia
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). His issue took the name de Portugal
Isabella of Braganza (1402–1465), married her uncle Infante John, Lord of Reguengos, son of John I of Portugal
Ferdinand I, Duke of Braganza (1403–1478), succeeded his father as second Duke of Braganza