The first reference to Yem as a political unit is found, under the name of Jangero, in the victory song of King Yesaq (1412-1427) of the Christian kingdom of Ethiopia, as paying tribute in the form of horses to the king.[1] The first European traveler to mention Yem was the European traveler Father Fernandez, who travelled through their homeland in 1614.
የየም ህዝብ ታሪክ እና ባህል በኢትዮጲያ (History and Culture of Yem People in Ethiopia)
