The Collaborative International Dictionary of English v.0.48:

Charlie \Char"lie\, n.
   1. A familiar nickname or substitute for Charles.
      [Webster 1913 Suppl.]

   2. A night watchman; -- an old name.
      [Webster 1913 Suppl.]

   3. A short, pointed beard, like that worn by Charles I.
      [Webster 1913 Suppl.]

   4. As a proper name, a fox; -- so called in fables and
      familiar literature.
      [Webster 1913 Suppl.]