"Haddocks' Eyes" is the nickname[1] of the name of a song sung by The White Knight from Lewis Carroll's 1871 novel Through the Looking-Glass, chapter VIII.
"Haddocks' Eyes" is an example used to elaborate on the symbolic status of the concept of "name": a name as identification marker may be assigned to anything, including another name, thus introducing different levels of symbolization. It has been discussed in several works on logic and philosophy.[2]