João Afonso Telo, 6th Count of Barcelos

João Afonso Telo, (died on 14 August 1385 in the Battle of Aljubarrota), mayor of Lisbon in 1372, admiral of Portugal from 1375 – 1376, and sixth Count of Barcelos, was a member of the highest ranks of the nobility, member of the Téllez de Meneses lineage as a descendant of Tello Pérez de Meneses.

He was the son of Martim Afonso Telo de Meneses — mayordomo mayor of Maria of Portugal, queen consort as the wife of King Alfonso XI of Castile — who was killed in 1356 following the orders of King Peter of Castile. His mother was Aldonça Anes de Vasconcelos, daughter of João Mendes de Vasconcelos,Alcalde of Estremoz, and Aldara Alfonso Alcoforado. He had one brother, Gonçalo Teles de Meneses, Count of Neiva and Lord of Faria, and two sisters, Maria Teles, murdered by her second husband, John, and Leonor Teles, queen consort by her marriage with King Ferdinand I of Portugal. He also had a half-sister, Joana Teles de Meneses, the wife of Juan Alfonso Pimentel, Count of Benavente.

During the third Fernandine War João Afonso Telo commanded the Portuguese fleet in the Battle of Saltes Island fought between the Crown of Castille, under the command of Fernando Sánchez de Tovar, and the Kingdom of Portugal. The result of the battle was the destruction of the naval offensive capability of Portugal, achieving the Castilian naval supremacy in the Atlantic Ocean. Portuguese chronicler, Fernão Lopes in his Chronica de el-rei D. Fernando blamed the defeat on the arrogance and haughtiness of the Count of Barcelos.

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