What do you think of the middle name Athley?

Never heard of it and not sure I would pronounce it correctly. Why not. If you like it, it is different and from what you say the name has real history. William has been one of my favorites for a long time. If you like it as a middle name. Go for it. If we listened to everyone else, we would all have the same names. How boring. After all it's you that have to like it and it's only a middle name.