Real name of Elvis Costello :

Declan McManus

Source: Newsday, 1/26/1998

 
   
  Real name of Adam Ant:

Stuart Goddard

Source: Broadcast News, 9/3/2004

 
   
  Real name of Boy George:

George O'Dowd

Source: Broadcast News, 7/12/2004

 
   
  Real name of Elton John :

Reginald Kenneth Dwight
Elton came up with his stage name by combining the names of band-mates from his first group, Bluesology.
Source: The Mirror, 12/13/1997