Fernão de Oliveira

Fernão de Oliveira, sometimes named Fernando de Oliveira or Fernando Oliveira, was a Portuguese grammarian, Dominican friar, historian, cartographer, naval pilot and theorist on naval warfare and shipbuilding. An adventurous humanist and renaissance man, he studied and published the first grammar of the Portuguese language, the Grammatica da lingoagem portuguesa, in 1536. He was an early critic of slavery and the slave trade.