Like elsewhere in the business side of music, there are plenty of ways to make mistakes. When it comes to trademarks, three to avoid are “failing to use an original and creative name, failing to do a clearance search for a name before using it and failing to register the artist’s name properly,” says Pelton.
Click link above for a recent article about the importance of trademarks for a musician /artist / rapper / stage name. I am quoted several times in the article.
The article does a nice job of detailing the risks as well as the benefits of proactively protecting trademarks. A music band or rapper’s name is their brand, and changing it or not being able to enforce it can be disastrous, not to mention expensive both in the change itself and in the loss of confused fans.