Jimmy Hoffa's middle name:

Riddle

Source: Washington Post, 6/17/1991

 
   
  Luther Vandross's middle name:

Ronzoni
Named after the pasta brand his mother craved during her pregnancy.
Source: New York Daily News, 9/20/2005

 
   
  Dick Clark's middle name:

Wagstaff

Source: Deseret News, 3/25/2002

 
   
  Ben Affleck's middle name:

Geza

Source: People, 12/2/2002