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"I met Harry when I went to Diagon Alley for my school supplies and he never told me who he was!" Hermione accused.

"Not true," Harry defended himself. "I distinctly remember telling you that my name was Harry Potter."

"But you didn't tell me that you were famous," Hermione complained. "Or anything about you miraculously defeating Voldemort when you were less than a year and a half old."

Harry and Neville both winced.

"You really shouldn't use that name," Neville told her seriously.

Hermione looked confused. "What name? Voldemort?"

Neville winced again. "That is the one, yes."

"Why not?" Hermione asked. "It's just a name and my dad says that fear of a name increases fear of the thing itself."

"That may be so," Harry agreed. "But think at it this way: everyone is still scared of You-Know-Who because they're not sure that he's really gone. There wasn't a body the night he disappeared and no one knows what happened. Ten years also isn't long enough for people to forget the horror of his reign of terror. Using that name will just make people uncomfortable and resentful."

"Besides…well, I should probably ask first," Neville said, almost to himself. "You're Muggleborn, right?"

"Yes, I am," Hermione said, surprised and a little wary. "How did you know?"

"You can't be a Pureblood as I don't recognize your surname and those raised with awareness of magic don't say that name," Neville explained reasonably. "And if you do say it, you'll only offend those who did grow up fearing his shadow and it'll only cause problems for yourself. You can decide to do it anyway, of course, but I just thought I'd warn you of what will probably happen if you do. I mean, I wouldn't do that but I think that a lot of other people would."

When In Doubt, Obliviate, Chapter 9