When using the calendar on my iPhone 4S it sends my invites using my son's name.

When I use my calendar on my iphone 4s it sends the invite using my son's name. I have 4 devices linked to my itunes account, one of which is his itouch. Does anyone have any suggestions on how to correct this issue to show my name instead of my son's? I've tried looking at all of my contact information to make sure that it shows my name and not his anywhere. Thanks!