Learning Voldemort's Name

[Deb]

No: HPFGUIDX 111466

So . . . most people flat-out refuse to use You-Know-Who's name. He's 
obliquely referred to in speaking and in print--up until very 
recently (Harry, the OotP, and then the DA), no-one but Dumbledore 
uses the man's name.

How, then, have all of Harry's classmates LEARNED the name so that 
they know to shudder, shake, fall off chairs when they hear it? I 
mean, if you've heard your whole life about "Harry Potter and He Who 
Must Not Be Named" and then you hear somebody say "Voldemort" . . . 
how DO you know that that's the same person?? (grin)

Deb in NJ