There's a delightfully insane theory running around that Dumbledore is, in fact, a time-travelling Ron. The Toast has made, quite possibly, the most beautiful series of proofs for this that I cried.

A little bit:

"In OotP, Ron is nearly strangled by some purple wizard robes while cleaning up Grimmauld Place. Who do we know wears purple robes?"

"Where were you, Ron?" Harry asked. "We've got to finish cleaning up before the rest of the Order get back."

"I'm not Dumbledore," Ron said quickly. "I'm Ron. And we're two different people, living in time normally, from back to front, as is our wizard custom."

"I know," said Harry. "I know that."

Ron pulled the purple robes back over his head. "Just out of curiosity, what year is it and also what name do you typically use when referring to me?"