What the wedding what was one thing Muriel told harry about the Dumbledore's?

She explained to him that Dumbledore had a long life, one that Harry was not aware of. She explained how Dumbledore grew up in Godric's Hollow, how he had a "friend", how he had siblings, relating all these topics to what was covered impressively in Rita Skeeter's biography of Dumbledore. By the end of the conversation, Harry questioned if he really knew the man at all.