Rondon, Cândido Mariano da Silva (känˈdēħŏ mərēäˈnŏ ħä sēlˈvə rŏndônˈ) [key], 1865–1958, Brazilian explorer and founder of the Indian Protection Service. A major in the army, he was appointed in 1907 to build a telegraph network through the rain forest of NW Brazil, and became concerned with the problems of the indigenous peoples. In 1910 he formed the Indian Protection Service, which he developed into one of the most humane organizations of its kind in the Americas. He was made a marshal in 1955. The Brazilian state of Rondônia is named after him.