Names represent the energy you are surrounding yourself with. This energy changes when you change your name. The first name is a lot like your sun sign, it is the name you are most commonly known by, so it's how you most like to appear to others. Your ego, your appearance. The middle name is more the inner self, the intimate self you only show to close friends. The family/last name reveals what you inherited from your family. All together they stand for your destiny, what is most likely to happen to you in your life.

Vowels and consonants have their own meaning - vowels are your inner self, consonants your outer self, and you can analyze each and every letter in your name too. The first letter of your first name (or letterS if it's a combo sound like SH) is "what you come in as" and the last letter of your first name is "what you go out as," or the tail that wags the dog, as it were. :)