See the second volume of the Genealogical History of the Tartars, and the lists of the Khans at the end of the life of Gengis, or Zingis. Under the reign of Timur, or Tamerlane, one of his subjects a descendant of Zingis, still bore the regal appllation of Khan; and the conqueror of Asia contented himself with the title of Emir or Sultan. Abulghazi, part v. c. 4. D'Herbelot, Bibliotheque Orientale, p. 878.