First Time Lord

First Time Lord was a title held by the leader of the Time Lord hierarchy. The First Time Lord during the Doomsday Weapon crisis (PROSE: Doctor Who and the Doomsday Weapon) was Lord President Pandad IV. (PROSE: The Legacy of Gallifrey)

Morbius, a former Lord President, claimed to be "a Time Lord of the First Rank" in his battle with the Fourth Doctor. (TV: The Brain of Morbius)