Before the Portuguese discovery of Brazil, the region where the present state of Rondônia is situated was populated by indigenous peoples, who are known to have included the following: pt:Aruás ; Cinta Larga ; Gavião ; pt:Jabutis ; Kanoê ; Karipuna, Amondauas ; Caritianas ; Araras-caros ; Kaxarari ; Kwazá ; pt:Macurap, pt:Sakurabiat ; Nambikwara ; pt:Oro-uins ; Paiter ; Tuparis. Wikipedia