The Collaborative International Dictionary of English v.0.48:

Havana \Ha*van"a\ (h[.a]*v[a^]n"[.a]), prop. a.
   Of or pertaining to Havana, the capital of the island of
   Cuba; as, an Havana cigar; -- formerly sometimes written
   Havannah. -- n. An Havana cigar.
   [1913 Webster]

         Young Frank Clavering stole his father's Havannahs, and
         . . . smoked them in the stable.         --Thackeray.
   [1913 Webster]