[1] : The Collaborative International Dictionary of English v.0.48

davy jones \da"vy jones"\
   the spirit of the sea; sea devil; -- a term used by sailors.
   1913 webster

         this same davy jones, according to the mythology of
         sailors, is the fiend that presides over all the evil
         spirits of the deep, and is seen in various shapes
         warning the devoted wretch of death and woe.
                                                  --smollett.
   1913 webster

   davy jones's locker, the ocean, or bottom of the ocean.

   gone to davy jones's locker, dead, and buried in the sea;
      thrown overboard.
      1913 webster
see also:
davy jones's locker gone to davy jones's locker 

[2] : WordNet (r) 2.0

davy jones
     n : the bottom of a sea or ocean syn: ocean floor, ocean
         bottom, seabed, sea bottom, davy jones's locker
see also:
ocean floor ocean bottom seabed sea bottom davy jones's locker 

[3] : Moby Thesaurus II by Grady Ward, 1.0

32 moby thesaurus words for "davy jones":
   davy, dylan, neptune, nereid, nereus, oceanid, oceanus, poseidon,
   thetis, triton, varuna, fresh-water nymph, kelpie, limniad,
   man fish, mermaid, merman, naiad, nix, nixie, ocean nymph,
   sea devil, sea god, sea nymph, sea-maid, sea-maiden, seaman, siren,
   undine, water god, water spirit, water sprite

Davy Jones >> D Words
Davy Jones, definition of term: Davy Jones
davy+jones_pag1.html

Davy >> D Words
Davy, definition of term: Davy
davy_pag1.html

Jones >> J Words
Jones, definition of term: Jones
jones_pag1.html

Dow Jones >> D Words
Dow Jones, definition of term: Dow Jones
dow+jones_pag1.html