Originally Posted by Gotham's Knight
What else would you call him? Unless I'm missing something here, Bane doesn't have any other name.
I believe in the comics one iteration gives him the name Edmund Dorrence, after his father. But for the most part he's only referred to as Bane, which in the context of the movie resonated because its a moniker that builds a measure of awe and legend around him that he cannot separate himself from. Just like with the mask. Without it he's a feeble nobody.
It's not much different than the Joker, come to think of it.