Afonso of Braganza, 1st Marquis of Valença
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Afonso of Braganza (in Portuguese Afonso), (1402? – 9 August 1460) was the eldest son of Afonso, 1st Duke of Braganza, natural son of King John I of Portugal, and of his wife, Beatriz Pereira Alvim, the only daughter of Nuno Álvares Pereira and Leonor de Alvim.[1][2]