If I name my son "Nintendo", and my son goes on to make headlines doing bad things, I can imagine the company named "Nintendo" wouldn't be too happy. Similarly if I named my kid "Google" or "Microsoft" or "Sony", etc..
As such, would the name you give your child be subject to copyright/trademark law?
As a follow-up, what about if I wanted to legally change my name to "Nintendo"? Lastly, what about the names of fictional characters? E.g. writing a story and having the main villain named "Nintendo"?