Genghis Khan was a Mongol military leader and the grandfather of Kublai Khan. (TV: "Assassin at Peking") Temulen Khatun was his docile and subservient sister. (PROSE: A Hundred Words from a Civil War)
According to one account, the First Doctor once encountered Genghis Khan. (PROSE: Time and Relative) According to another account, the First Doctor claimed to Genghis' grandson that he had heard of Genghis but hadn't met him. (TV: "Assassin at Peking")
The Seventh Doctor claimed to have delivered Genghis Khan, describing him as "a sweet baby." (PROSE: Tragedy Day)
When the Master claimed he wanted to rule people "for their own good", the Third Doctor wondered if he had heard Genghis Khan say the same thing. (TV: The Dæmons)
The Bruce Master once lied and told Chang Lee that the Doctor had been Genghis Khan. (TV: Doctor Who)
The Doctor's TARDIS once withstood an attack from the hordes of the Genghis Khan, as recounted by the Sixth (AUDIO: City of Spires) and Ninth Doctors. (TV: Rose)