Isabel of Barcelos
|Lady of Reguengos de Monsaraz, Colares and Belas|
|Died||26 October 1466|
|Spouse||John, Constable of Portugal|
|House||House of Braganza|
|Father||Afonso I, Duke of Braganza|
|Mother||Beatriz Pereira de Alvim|
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.
Isabel and Infante John had four children:
- Infante Diogo of Portugal (1425–1443) – 4th Constable of Portugal and 11th Master of the Order of St. James;
- Infanta Isabella of Portugal (1428–1496), married John II of Castile, mother of Isabella I of Spain
- Infanta Beatrice of Portugal (1430–1506), married Infante Ferdinand, Duke of Viseu, mother of Manuel I of Portugal
- Infanta Phillipa of Portugal (1432–1444), Lady of Almada
|Ancestors of Isabel of Barcelos|
- 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.
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