That's what they say about the Drabwurld. According to everything I've read the Drabwurld is the origin of all our worlds, so they're going to have stories or events that reflect our worlds.

[ Hermione didn't spend much time on fairytales, but she does accept that there are things that are true - magic, she knows, is one of them now. Does that mean she'll believe every story? No, but...

Breathing out, she purses her lips and lifts her head, eyes flickering everywhere before they settle. ]

I used a spell on them to make them forget... To protect them from a war, from insane people that would have killed them.