The summer before Al Potter started Hogwarts, he informed his parents that he now wished to be called Severus.

"Well, that's fine, I suppose." his father shrugged. "But why?"

"Because I've read a lot about Albus Dumbledore and Severus Snape. Albus Dumbledore was a brilliant wizard. But sometimes he could be rather manipulative, and he used people to suit his own purposes, including you, Dad. Severus Snape was was very brave man. He was an extremely talented wizard, and much more intelligent than he let anyone know. And he loved, very deeply, and remained loyal to the one he loved all of his life."

Harry nodded, understanding the boy in front of him was unfailingly loyal to the one he loved. "That's a very mature, very intelligent answer, son."

The boy grinned. "And Cassie likes it better."