Isabel of Portugal, Lady of Viseu

Isabella of Portugal in the Genealogy of Manuel Pereira, 3rd Count of Feira (1534)

Isabella of Portugal (c. 1364– Marans, 4 April 1435) 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,[1] with whom he was said to have had an incestuous relationship according to the chronicler Fernão Lopes.[2]

  1. ^ de Mello Vaz de São Payo, Luíz (2007). "Escandaloso incesto na corte portuguesa do século XIV". Revista de Estudos Transmontanos e Durienses. 13.
  2. ^ Bonat Trevisan, Mariana. 2020. «Das representações às experiências femininas vividas: As irmãs Maria e Leonor Teles na corte e na cronística portuguesas da Baixa Idade Média». De Medio Aevo 9, nº July: 72. https://doi.org/10.5209/dmae.69916