George or Joss, born Doo a Makongo or Doo a Mukonga, was a king of the Duala people in the late 18th century. Doo a Makongo was the son of Makongo a Njo. He lived at Douala on the Wouri estuary on the coast of Cameroon. By 1788–1790, Doo was a powerful ruler in the area. During this time, the British slave trade was at its height, and Douala was the primary trading post in the region.