Johann Jakob Erhardt, or John James Erhardt, was a German missionary and explorer who worked in East Africa and India. Although he remained on or near the coast of East Africa, he contributed to European knowledge of the interior through gathering descriptions from local people who had traveled there. His map of the region stimulated dispatch of the expedition of Burton and Speke.

Kimweri ya Nyumbai or Shekulwavu Kimweri ya Nyumabi, also known as, , was the King of the Shambaa people of the Usambara Mountains in what is now Tanga Region of Tanzania between around 1815 and 1862. Under his rule the kingdom reached its greatest extent. However, disruptions caused by the introduction of firearms and the slave trade caused the kingdom to fall apart after his death.