History of Magic was not necessarily Olly's best subject, but he wasn't always horrible at it. His dads were both wizards so they'd taught him a bit of history growing up. And while he didn't always pay attention to every bit of information that crossed his path, he picked some things up and did his best to pay attention in class. This was one question that he actually felt fairly confident about. He'd definitely heard the name Albus Dumbledore and knew a few things about him too.

"He was a former Headmaster of Hogwarts." Everybody knew that. He had not known, however, that he had started as a Transfiguration professor. "He was involved in a famous duel with the dark wizard Grindewald." Those were the biggest bits of information he knew.