The term "Khagan" refers to a title used by the rulers of various Central Asian empires, particularly among the Turkic and Mongolic peoples. It signifies a supreme leader or emperor, often overseeing multiple tribes or nations. The title is derived from the Old Turkic word "kagan," which means "ruler" or "king." Historically, the most notable use of the title was by the Mongol Empire under Genghis Khan and his descendants. The Khagan held significant power and authority, often commanding vast territories and armies. This title was also used in the Uyghur Khaganate and the Gokturk Khaganate, reflecting its importance in the region's political hierarchy.