MARBAU, Pedro de (mar-bow'), Spanish missionary, born in Toledo, Spain, about 1630; died in Lima about 1706. He went to South America in 1665, and was attached to the missions of Bolivia. In 1675 he became assistant to the superior of the Bolivian missions, and was charged by him with the exploration of the vast territory of the Moxos Indians, situated between 13º and 16º of south latitude. The mission was successful. The Jesuits were kindly received by the natives, and organized them into villages. A few years later 20,000 Indians composed the new Moxos missions, and the country possessed churches and factories. Marbau held for a few years the post of superior general of the Moxos missions, but his health failed and he retired to Lima, where he became chaplain to his kinsman, the Count of Montclova, the viceroy. He published "Arte de la Lengua Moxa con su vocabulario y Catecismo " (Lima, 1701).