The Collaborative International Dictionary of English v.0.48:

Genevan \Ge*ne"van\, a.
   Of or pertaining to Geneva, in Switzerland; Genevese.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Genevan \Ge*ne"van\, n.
   1. A native or inhabitant of Geneva.
      [1913 Webster]

   2. A supported of Genevanism.
      [1913 Webster]

WordNet (r) 3.0 (2006):

Genevan
    n 1: a native or resident of Geneva
    2: an adherent of the theological doctrines of John Calvin [syn:
       Calvinist, Genevan]