The Collaborative International Dictionary of English v.0.48:

Memphian \Mem"phi*an\, prop. a.
   1. Of or pertaining to the ancient city of Memphis in Egypt;
      hence, Egyptian; as, Memphian darkness.
      [1913 Webster]

   2. Of or pertaining to the city of Memphis in Tennessee.
      [PJC]

The Collaborative International Dictionary of English v.0.48:

Memphian \Mem"phi*an\, prop. n.
   A native or resident of the city of Memphis in Tennessee.
   [PJC] memsahib