Ferdinand I of Portugal

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Ferdinand I (

Ferdinand was born in Coimbra, the second but eldest surviving son of Peter I and his wife, Constanza Manuel.^[2][3] On the death of Peter of Castile in 1369, Ferdinand, as great-grandson of Sancho IV by his grandmother Beatrice, laid claim to the vacant Castilian throne. The kings of Aragon and Navarre, and later John of Gaunt, Duke of Lancaster, who had married Peter of Castile's eldest daughter, Constance, also claimed the throne.^[4]

The throne was held by his second cousin

This conduct, although it raised a serious insurrection in Portugal, did not at once result in a war with Henry. However, the outward concord was soon disturbed by intrigues with John of Gaunt, Duke of Lancaster, brother of Edward the Black Prince, who entered into a secret treaty with Ferdinand for the expulsion of Henry from his throne. The war which followed was unsuccessful; and peace was again made in 1373,^[6] with a treaty which enforced the exile of Ferndinand's last galician supporters.^[4]

On the death of Henry in 1379, the Duke of Lancaster once more put forward his claims, and again found an ally in Portugal.^[7] In 1381, conflict erupted on the Portuguese-Castilian frontier but the English army, led by Edmund Langley, was ineffectively equipped and financed.^[7][8] So Ferdinand made a peace for himself at Badajoz in 1382. In 1383, the Treaty of Salvaterra stipulated that Beatrice, Ferdinand's daughter and heiress, would marry King John I of Castile,^[7][8] and thus secure the ultimate union of the two crowns.^[4]

Ferdinand left no male heir when he died, probably from poisoning, at Lisbon on 22 October 1383,

Fernando married Leonor Teles de Meneses, formerly the wife of the nobleman João Lourenço da Cunha, Lord of Pombeiro, and daughter of Martim Afonso Telo de Meneses.

Ancestry

References

Bibliography

• García Oro, José (1987): Galicia en los siglos XIV y XV. Fundación "Pedro Barrie de la Maza, Conde de Fenosa", A Coruña.
  ISBN 84-85728-59-9
  . (in Spanish)
• ISBN 0582098130
  .
• Livermore, H.V. (1969). A New History of Portugal. Cambridge University Press.
  ISBN 9780521095716
  .
• Varela Fernandes, Carla (2009): The Image of a King. Analysis of the tomb of King D. Fernando I. Carmo Archaeological Museum/Portuguese Archaeologists Association, Lisbon. (English ed.)