Darth Bane
Darth Bane was the Sith who reinstated the tradition of bestowing the name Darth to all of his successsors and alsorestored the 'Rule of Two'.
Episode I: The Phantom Menace, 1st edition paperback, 1999.
Terry Brooks,
George Lucas, ISBN 0-345-43411-0
The Dark Side sourcebook,
Wizards of the Coast, 1st printing, 2001. Bill Slavicsek, J. D. Wiker, ISBN 0-786-91849-7
The New Essential Guide to Characters, 1st edition, 2002. Daniel Wallace, Michael Sutfin, ISBN 0-345-44900-2
Episode III: Revenge of the Sith - Novelisation, 1st edition hardcover, 2005. Matthew Woodring Stover, George Lucas, ISBN 0-7126-8427-1
*The New Essential Star Wars Chronology