Oacco
Oacco, also called Haco, was an inland kingdom in the country south of the Kwanza. In the seventeenth century the Capuchin missionary Giovanni Antonio Cavazzi travelled through Angola and visited the lands of its ruler, Guzambambe. Missionary accounts record that the ruler was baptized in 1657. Oacco appears alongside Tamba, Libolo and other districts in descriptions of the region's many chiefdoms and their relationships with the expanding Portuguese presence.