Isabella of Portugal was the natural daughter of King Ferdinand I of Portugal, from an unknown mother. Though, it was rumored at the time that her mother was none other than the king's half-sister, Beatrice, Countess of Albuquerque, with whom he was said to have had an incestuous relationship according to the chronicler Fernão Lopes.
- Citizenship
- Kingdom of Portugal
- Born
- 1364
- Died
- April 4, 1435
