Source : Webster's Revised Unabridged Dictionary (1913)

Galatian \Ga*la"tian\, a.
   Of or pertaining to Galatia or its inhabitants. -- A native
   or inhabitant of Galatia, in Asia Minor; a descendant of the
   Gauls who settled in Asia Minor.

Source : WordNet®

Galatian
     n : a native or inhabitant of Galatia in Asia Minor (especially
         a member of a people believed to have been Gauls who
         conquered Galatia in the 3rd century BC)