- (1355-1392) Daughter of Pedro of Castille and María de Padilla.
- Married Edmund Langley, Duke of York, son of Edward III of England (1372).
- While still quite young, her father had proposed her marriage to Prince Dinis, son of Pedro of Portugal and Inês de Castro (1358), though the marriage should only take place six years later. In reality, it never too place.