I didn't know that. I did a little research. this seems pertinent if true:

For any suspicious minds out there, Graceland spokeswoman Danna Yarmowich offers an explanation for the misspelling: Elvis wanted it that way.

Yarmowich said Elvis was named after a friend of the family, Aaron Kennedy. His family spelled his middle name with one "a" because they wanted it to match that of Elvis's stillborn twin, Jessie Garon.

But during the later years of his life, Elvis wanted it spelled "the way it is in the Bible" -- Aaron.

Several months before his death, Elvis began checking on the possibility of legally changing the spelling, Yarmowich said.

Then Presley found a pleasant surprise on a copy of his birth certificate - someone had accidentally spelled his middle name with two "a's," exactly the way he wanted it.

From then on, everything Elvis signed carried the middle name "Aaron," Yarmowich said.

and Bubba, muchas Gracelandious for the photos. there are some great ones in there. and those were some tough subjects to make look right. thanks again.