There's a name on your birth certificate--and whether you like it or not, it's your "real name" for this lifetime because it represents not only your ancestry, but also the way your parent(s) originally imagined you. Your birth name is not necessarily your only name, though. If you are exploring your identity, following a spiritual path, marking a life transition, or just feeling rebellious, it may be time to relabel yourself!
If you're interested in changing your name for public purposes, visit the helpful Nolo site to find out how what's involved. (Less than you'd think, actually.) But most of us aren't looking for a new identity--just a "rebirth" name, something that tells us who we have become or reminds us of who we wish to be.
If you need help in finding your true name, visit the The Ya-Ya Name Generator , where "the Mistress of Names, descendant of the Divine Tribes of Ya-Ya" will bestow your Sisterhood name. (Note: The generator is case-sensitive, which means that you'll get different names if you do or don't use initial capitals when you put in your birth name. Based on a very small survey, the Ya-Ya name returned seems more "true" when capitals are used.) If you haven't a clue what Ya-Ya means, catch up by reading the best-selling book.
Another cool name-finding tool is brought to you by BuddhaMind. When you get there, choose "your essential name" from near the bottom of the gray panel. My personal experience was that the name given to me evoked instant recognition.
Curious about why people change their names and what happens then? For the true story of a chosen name, and how it has taken up a long life of its own, enjoy Cat Yronwode's short autobiography. Then be sure to browse her wonderful shop/site/school/library luckymojo.
Finally . . . suppose you want to go beyond name play to an "extreme makeover" of your whole persona. Well, start by reading the Building Your Brand series for some insightful ideas about using astrology to create your personal "marketing" campaign. (Posts in this series are reverse-ordered, so scroll down to the bottom and work your way up!) If you are even more interested in branding and symbolism, don't miss this fascinating book: The Hero and the Outlaw: Building Extraordinary Brands Through the Power of Archetypes by Carol S. Pearson.