[waso]

History's often a good place to get names from. How about "Hermes", after the God of thieves and travelers.

On that note, Janus was the two-faced god, which might be fitting for Harry.

Ooh, what about Clear-as-Mudd?

I'm also a fan of using history as a starting point.

However I can't get "Stache" out of my head for Mudd's ungodly hideous mustache!