Actually Cindy, the name of David Bowie's son is Duncan Zowie. He used to go by the name of Joe, but he now uses his given first name, so now he's known as Duncan Jones. (David Bowie's real name is David Robert Heyward-Jones.)
As previously mentioned, David Bowie's son is named Zowie Duncan Howard Bowie Jones, and he now goes by Duncan Jones. They gave him two middle names "in case he didn't like his kooky name." I remember reading that Angie, David Bowie's wife, picked it because it meant something in an African language, but I seriously doubt that. I kind of like this spelling as a pseudonym, even though I usually hate kre8tiv names.