I agree with Saucepan Man (who doesn't?

) in that going many places gave Aragorn his many names, not necessarily hiding from the law.
I have moved over 15 times in my life, so I meet hundreds of thousands of people, (really, I do) and all these people give me different names; here's a few:
Fred
William wallace
wierdo(I'm still called this one)
Brian Boru
Robert Bruce
Bob
Billy-Bob
...
The list goes on with the more people I meet.
Does anyone else get multiple names, like Aragorn?