Maybe his name is Bingle Bongle Dingle Dangle Yickedy Doo Yickedy Dah Ping Pong Lippy Tappy Too Tah. [yt]http://www.youtube.com/watch?v=Ide875qiH2Q[/yt]
While the birth certificate says Nee Peng Neewom, his real name is It. His darkest secret will involve Clara discovering what really happened at Castle Anthrax with the shrubbery and herring.
It's probably something like Candy Stinkcrotch or Pedophilius Whackamole, perfectly normal names on Gallifrey but after spending so much time with humans his name now sounds like an embarrassing joke name to himself.