You may be looking for the standard alias of the Doctor.

The Honourable Aubrey Waites was a singer who used the stage name "Chris Waites" during his time leading Chris Waites and the Carrollers. He later used the stage name "John Smith" during his time leading John Smith and the Common Men. (TV: "An Unearthly Child"; PROSE: Time and Relative)

The Fifth Doctor, in fact, suggested to the Common Men in November 1963 that they become a backing group for Waites, and directly caused the creation of John Smith and the Common Men. The Common Men were slightly reluctant at first, but willing to do "whatever pays". (AUDIO: 1963: Fanfare for the Common Men)

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