Kublai Khan

Kublai Khan was the grandson of Genghis Khan, a Templar suspected to have "A Piece of Eden"

Relevance to Assassins Creed Universe
The only time he is mentioned is in Domenico Auditore's biography, where it is stated that Marco Polo met him while visiting the Court of Genghis Khan, where he retrieved Altaïr's Codex