Pedro Teixeira
Pedro Teixeira (b.1570-1585 - d.4 July 1641), occasionally referred to as the Conqueror of the Amazon, was a Portuguese conquistador and military officer, who became, in 1637, the first European to travel up and down the entire length of the Amazon River, he also headed the government of the captaincy of Pará in two different periods, one in 1620-1621 and another in 1640–1641.Teixeira was born either in 1570 or 1585 at the Vila of Cantanhede, born to a noble family, he was a Knight of the Order of Christ and a Portuguese nobleman in service of the royal family, he married Ana Cunha in Praia, Azores, daughter of Sargento-Mor Diogo de Campos Moreno, with whom Teixeira fought together in Maranhão
First arriving in Brazil on 1607, Teixeira participated in Portugal's campaign against French Maranhão, he fought in the Battle of Guaxenduba and distinguished himself commanding either the fort of ''Natividade'' or ''Santa Maria''.
Because of Teixeira and other Portuguese who pushed into the depths of the Amazon, Portugal was able to obtain far more of South America from their Spanish competitors than the Treaty of Tordesillas had granted in 1494. Teixeira's expedition became the first simultaneously to travel up and down the Amazon River. He was called by the Indian natives ''Curiua-Catu'', meaning ''The Good and Friendly White Man''. Provided by Wikipedia