I can't verify this story, since I've never met the guy, but my mother and father both swear by the following story:
Until about two days before I was born, I was going to be Nicholas Aaron [MyLastName]. Nicholas was a good friend of my dad's who had gone to Vietnam and served honorably. However, Nick brought the war home with him. One day Dad read in the paper that he'd been thrown in the clink for beating his wife within an inch of her life. Dad decided he didn't want that negative energy attached to me, so he and Mom changed it to Aaron Nicholas [MyLastName].
Aaron is a good name. A strong, Biblical name that is neither too common (Matthew, John), nor too obscure (Hezekiah, Gomer).
These days everyone just calls me "Homie." Strangely enough, that's my dad's nickname as well. So whenever I'm at his place playing Saturday night playing Texas Hold 'Em, invariably someone will say "Homie!" to get his attention, and we'll both say "What?!"