Count of Olivença
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Count of Olivença, (Portuguese: Conde de Olivença) was a Portuguese title of nobility created by a royal decree, on 21 July 1424, by King Afonso V of Portugal, and granted to Dom Rodrigo Afonso of Melo.
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He was the sole count of this title. His daughter and heir, Dona Filipa de Melo, married Álvaro of Braganza. From this marriage descends the House of Cadaval.