Genghis Khan

Genghis Khan was a Mongol human dictator of the 12th and 13th centuries.

In 2151, upon learning of the power of the Malkus Artifacts, Captain Jonathan Archer wondered what the tyrants of human history, including Genghis Khan, would have done with such a device. (The Brave and the Bold: "Prelude: Discovery")

James T. Kirk mentioned Genghis Khan to Roger Korby in 2266, after Korby implied human programming leading to near-practical immortality as the major impact of transferring the human consciousness into an android body. (TOS episode: "What Are Little Girls Made Of?")

In 2269, an image of Genghis Khan was created by the Excalbians in a plot devised to better understand the concepts of "good" and "evil". (TOS episode: "The Savage Curtain")