President (Birth of a Renegade)

This Lord President was the grandfather of Pundat the Third. With the approval of his High Council (which he allegedly bribed), he rewrote the Constitution of the Time Lords to allow the Lord President to name his successor. His intention was to create a family dynasty. (RT: Birth of a Renegade)

Behind the scenes
It would seem logical to assume that since his grandson, also Lord President, was Pundat the Third, this Lord President was Pundat the First. However, that name is not used in Birth of a Renegade, the sole source to refer to him.