<human>: Can you condense the text into three sentences or less?

Hey /r/legaladvice, I have a question that I've been pondering for awhile and hope you can help out and answer this one.

Let's say my legal birth name is David Throwaway and I'm an entertainer/musician/juggler/what have you and I want to use the stage name "David" for my performances and my tricks/material. Not "David Throwaway, Magician Extraordinaire", nor "David The Magic Man" nor "David Throwaway", just "David".

Now is there any real danger of being sued for this? I wouldn't think so, because I'm using my birth name to sell/promote a product and not someone else's, yet I don't want to be sued by some electronic company called "David's Electronics" because of some issue of likeness. Is this a copyright issue? A trademark issue? Or am I talking a bunch of nonsense?
<bot>: Could using your legal birth name to promote a service or product (in the entertainment industry) lead to dangerous legal consequences?