On a platform Musk is creating ownership ripples he uses Harry Godwyn. Here and on another platform at least asking for correct names he is seen as Charles Hankey.
I never saw a passport or a drivers license, and those are easy to fake, esp. in Spy Trade ;-)) As pen names are not unusual, I'd say chances of Harry Godwin being his real name are mighty slim. (I have no reason to assume Charles Hankey is another alias)