The Collaborative International Dictionary of English v.0.48:

Jane \Jane\ (j[=a]n), n. [LL. Janua Genoa; L. Genua, also OE.
   Jean.]
   1. A coin of Genoa; any small coin. --Chaucer.
      [1913 Webster]

   2. A kind of twilled cotton cloth. See Jean.
      [1913 Webster]