What's in a name?

Does a name define the person? Or does the person define the name? Like for instance, the name Gwen - is it cool? I've never known it to be particularly amazing, and now we have Gwen Stefani, and she rocks her name. Now when I hear the name Gwen, I automatically think of Gwen Stefani, and the name perception for me has changed. Marshall Mathers? Not cool at all, but is he cool - YES.... and 50 cent's name is Curtis? I figure that we can hold and shape our name in a way that defines who we are. But what if your name is Jennifer? How do you define yourself apart from the crowd when half the country has that particular name? And what if your last name is a common one, like Jones or Smith..... Maybe that's when a jazzy nickname is appropriate - like J.Lo!