Changing a child's name?

Well at five years old you can easily change his name and he'd get used to the new one (my parents have done that frequently, and tho I don't like the idea it's worked fine and the kids don't even remember being called by anything else) but if you left it the same, just make sure you start calling him by a nickname NOW so he can get used to it. But if you want to be part of the naming, but don't want to confuse the kid, just change the middle name (my parents just changed my middle name so they could take part in "the naming process" and it worked just fine:P) hope that was at all helpful:)