Wordplay in HP

[Haggridd]

No: HPFGUIDX 18630

I was listening today to the Fry recording of CoS-- don't worry, I 
won't inflict one of my Interim Reports on you all today-- when I 
realized that I had missed the pun in Sir Nicholas de Mimsy 
Porpington's name.  I was flabbergasted that I had not picked up that 
the sobriquet of a ghost whose head was not completely cut through
was Nearly Headless "Nick"!  How stupid of me!  I had always enjoyed
JKR's sense of humor and the great care she exercised in her writing. 
I am not speaking of claasical or other allusions, like Sirius (the 
Dog Star) Black being an animagus for a black dog, but of simple
wordplay, like that of Peeves-- if this poltergeist acted up around
me I would certainly be peeved.

My favorite pun has not lasted byond PS, sadly.  It is he Inn where 
Hagrid got his dragon egg, The Hogshead.  You have the Head of a Hog, 
naturally, and the carrying forth of the Hog theme of Hogsmeade, but 
you also have the delicious fact that a hogshead is a big keg of ale 
equal in measure to that of three barrels.  I was so disappointed
when JKR used The Three Broomsticks in later books.  Does anybody else
have a favorite pun?

Haggridd