Severus: Severus is the name of severus snape, professor of Potions at Hogwarts, dean of Slytherin College (later became professor of defense against the dark arts at Hogwarts and president of Hogwarts). Snape was Harry's father's childhood classmate and rival in love. Like Zhan Mu, he likes Lily Evans (Harry's mother, later lily potter), one is Slytherin College and the other is Gryffindor College, so he has been enemies since childhood. Coupled with that gaffe to Lily (see Chapter 28 of the Order of the Phoenix for details), Snape completely lost Lily's friendship. As an adult, he heard a prophecy (only half of it), which indirectly led Voldemort to kill Lily and Zhan Mu. He was so miserable that he followed Dumbledore's advice and became a double agent, but he made Dumbledore swear that all this would not be known to anyone except them (Chapter 33 of Deathly Hallows). When Harry grows up and goes to school, Snape makes it difficult for Harry (because Harry is like his father Zhan Mu, and Zhan Mu often curses him) and becomes Harry's most hated teacher. In harry potter and the half-blood prince, Snape killed Professor Dumbledore according to Dumbledore's instructions. Since then, he has been accused and spurned by people. In the seventh book, he was proved innocent, but by then Snape had died for the destruction of the Order of the Phoenix and Voldemort. Before he died, he struggled to look into Harry's eyes in order to leave in the eyes of his favorite person, and Albus was the only child among Harry's three daughters who inherited Lily's green eyes. Harry named his son Severus in memory of severus snape, one of the bravest men in history.
Albus percival Woolfik Bryan Dumbledore:
Severus snape: