- You may be looking for First of the Time Lords.
The titles of First Time Lord, Second Time Lord and Third Time Lord referred to "the three most superior Time Lords".
It was synonymous with the title of President of the High Council. To blow the Horn of Rassilon was meant to summon "the First Time Lord" from the Matrix; Captain Argento imagined this meant Rassilon, (AUDIO: Morbius (part 2) [+]Loading...{"part":"2","1":"Morbius (audio story)"}) sometimes called First of the Time Lords, (PROSE: The Legacy of Gallifrey [+]Loading...["The Legacy of Gallifrey (short story)"]) but discovered after using it that it would actually summon a Matrix projection of whatever President would be most useful in the situation, past or future. In practice, she found herself confronted with the Fourth Doctor. (AUDIO: Morbius (part 3) [+]Loading...{"part":"3","1":"Morbius (audio story)"})
A First, Second and Third Time Lord formed the High Tribunal (PROSE: Doctor Who and the Doomsday Weapon) who sentenced the Second Doctor to his exile on Earth. (TV: The War Games) The First Time Lord at the trial had a different appearance (TV: The War Games, PROSE: Doctor Who and the Doomsday Weapon) from the form he adopted during the Doomsday Weapon crisis. (TV: Colony in Space, PROSE: Doctor Who and the Doomsday Weapon)
Many other accounts showed that the leader of the Time Lords was known as the President of the High Council or Lord President. 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) Both the President and the Chancellor were recognised as Senior Time Lords. (PROSE: The Three Doctors)