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

johnny \john"ny\, n.; pl. johnnies.
   1. a familiar diminutive of john.
      1913 webster

   2. zool. a sculpin. local cant
      1913 webster

   johny crapaud, a jocose designation of a frenchman, or of
      the french people, collectively.
      1913 webster
see also:
johnnies john johny crapaud 

[2] : WordNet (r) 2.0

johnny
     n : `johnny' was applied as a nickname for confederate soldiers
         by the federal soldiers in the american civil war;
         `grayback' derived from their gray confederate uniforms
         syn: rebel, reb, johnny reb, grayback
see also:
rebel reb johnny reb grayback 

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

83 moby thesaurus words for "johnny":
   adamite, wc, backhouse, basement, bastard, bathroom, bedpan, being,
   bird, body, bugger, can, cat, chamber, chamber pot, chap,
   character, chemical closet, chemical toilet, closet,
   comfort station, commode, convenience, crapper, creature, customer,
   duck, earth closet, earthling, feller, fellow, groundling, guy,
   hand, head, homo, human, human being, individual, jasper, jerry,
   john, johnny house, joker, jordan, lad, latrine, lavatory, life,
   living soul, loo, man, mortal, necessary, nose, one, outhouse,
   party, person, personage, personality, piss pot, potty,
   potty-chair, powder room, privy, rest room, single, somebody,
   someone, soul, stool, stud, tellurian, terran, throne, thunder mug,
   toilet, toilet room, urinal, washroom, water closet, worldling

Johnny >> J Words
Johnny, definition of term: Johnny
johnny_pag1.html

Johnny Grindle >> J Words
Johnny Grindle, definition of term: Johnny Grindle
johnny+grindle_pag1.html

Johnny Cake >> J Words
Johnny Cake, definition of term: Johnny Cake
johnny+cake_pag1.html