Please don't respond if you don't know what you're talking about. Only respond with a definite answer, you just proved you know as much about this topic as the OP does.
The answer is no, it will only change AT&T to your name. If you go to the UK and roam on Orange (I'm not even sure AT&T is partnered with them as their UK carrier, but this is just an example), it will show up as Orange, not your name. But the second your phone connects to an AT&T tower when you return from your trip, it will show your name.