Source : Webster's Revised Unabridged Dictionary (1913)

Neapolitan \Ne`a*pol"i*tan\, a. [L. Neapolitanus, fr. Neapolis
   Naples, Gr. ?, lit., New town.]
   Of of pertaining to Naples in Italy. -- n. A native or
   citizen of Naples.

Source : WordNet®

Neapolitan
     adj : of or relating to or characteristic of Naples or its people