Source : Webster's Revised Unabridged Dictionary (1913)

Fetichist \Fe"tich*ist\, Fetishist \Fe"tish*ist\, n.
   A believer in fetiches.

         He was by nature a fetichist.            --H. Holbeach.

Source : WordNet®

fetishist
     n : one who engages in fetishism (especially of a sexual nature)