Real name of rapper Eminem:

Marshall Mathers III
Took his stage name from the initials of his real name, M.M.—that is M ‘n M, phonetically “eminem”
Source: Associated Press, 1/25/2005

 
   
  Real name of rapper Jay-Z:

Shawn Carter
Additionally goes by the pseudonyms Hova, Jigga, and Jigga man.
Source: Daily News, 2/2/2005

 
   
  Real name country singer Shania Twain :

Eileen Regina Edwards

Source: People , 4/12/2004

 
   
  Real name of Little Richard :

Richard W. Penniman

Source: Associated Press, 8/16/1984