"Of course, he knew, Harry." Neville’s gentle voice came from behind. He walked up to them and placed a hand on Harry’s shoulder. "As did I. Everyone from the old families knew the story of how the Potters were betrayed by their secret keeper. It started a series of alliances between the families to ensure something like that would never happen again. It’s not Teddy’s fault though. He is not his father. Remember what I told you, Harry. It is very easy to give into hatred."