Where did Alexandra Graham Bell get his middle name from?

Alexander Graham Bell - Wikipedia, the free encyclopedia (http://en.wikipedia.org/wiki/Alexander_Graham_Bell)

Where did Alexandra Graham Bell get his middle name from?
Alexander Graham Bell adoped his middle name from a close family friend.

Alexander had informed Glen Curtis That the way to control aircraft, was Aielerons, not Wing warping. Later the wrights would fight in courts, one brother would die, later they would form Curtis-Wright, Alexander and Glen's friendship was possibly little influenced by the fact Alexanders' wife was Blind and Glens' sister was blind. Or vice-versa.
Was probably good for all of them.
Nothing to do with his middle name, Just interesting.