According to Diop, the Egyptians referred to themselves as "Black" people or kmt, and km was the etymological root of other words, such as Kam or Ham, which refer to Black people in Hebrew tradition.[96][97] Diop,[3] William Leo Hansberry,[98] Aboubacry Moussa Lam[99] and other supporters of the Black Egyptian hypothesis have argued that the name kmt or Kemet was derived from the skin color of the Nile valley people, which Diop et al. claim was black.[75][100][101] The claim that the Ancient Egyptians had black skin has become a cornerstone of Afrocentric historiography,[98] but it is rejected by most Egyptologists.[102]