Sure you could literally analyze the name, the "Underground Man", to mean a man that actually lives underground. I'd never really thought of why he is called the Underground Man until now. Maybe Dostoyevsky wants to symbolize the fact that he is so cooped up in his little, over-analyzed, psychotic-thinking world that he'd be just as well off living underground, rather than above ground, where every other person lives and interacts with society. I sort of agree with this proposal and think that the Underground Man should live underground and spare the rest of society his insults. Maybe if he lived underground he would come up with the idea that he is superior to every creature under there and be happy with himself, and quit over-analyzing everything he sees or thinks of.