1. How many times can you legally change your name?
As many times as you like. Legal limits to changing names apply to the reasons for the name change
and what you change your name to. For example, you cannot change your name even once for the
express purpose of avoiding a debt. Likewise, you can't change your name to a threatening or
obscene word.
Source:
FindLaw: Name Changes FAQ
http://www.answerbag.com/q_view/2121379