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Isabel of Barcelos (October 1402 – 26 October 1466), also known as Isabel of Braganza, was a lady of the Portuguese nobility during the Late Middle Ages. She was the daughter of Afonso I, Duke of Braganza and Beatriz Pereira de Alvim, she married Infante John, Lord of Reguengos de Monsaraz, her half-uncle, son of John I of Portugal.

Lady of Reguengos de Monsaraz, Colares and Belas
D. Isabel de Barcelos (1402-1465) - Genealogia de D. Manuel Pereira, 3.º conde da Feira (1534).png
Isabel in a 1534 miniature in the Genealogy of D. Manuel Pereira, 3rd Count of Feira
Born October 1402
Died (1466-10-26)26 October 1466
Burial Batalha Monastery
Spouse John, Constable of Portugal
House House of Braganza
Father Afonso I, Duke of Braganza
Mother Beatriz Pereira de Alvim
Religion Roman Catholicism


Isabel and Infante John had four children:

Isabel died in the town of Arévalo on 26 October 1466 at the age of sixty-four. She was buried in the Batalha Monastery alongside her husband.



  1. ^ de Sousa, Antonio Caetano (1735). Historia genealogica da casa real portugueza [Genealogical History of the Royal House of Portugal] (in Portuguese). 2. Lisboa Occidental. p. 167.