1. J.J. Cale, John Cale
    Still not sure about this one.
  2. Cecil B. DeMille, C.C. DeVille
    Movies & mousse
  3. Mick Jones, Brian Jones, Mick Taylor
    Corollary: I also used to think McJagger was someone's last name. Same with Van Morrison.
  4. Mendel, Mengele, Mendeleev
    Peas, periodic tables & persecution
  5. Saul Bass, Saul Bellow
    One of 'em makes/made movie posters maybe?
  6. Jack Tripper, Jack The Ripper
    The body count at the Regal Beagle was out of control.