The Collaborative International Dictionary of English v.0.48:

Faitour \Fai"tour\, n. [OF. faitor a doer, L. factor. See
   Factor.]
   A doer or actor; particularly, an evil doer; a scoundrel.
   [Obs.]
   [1913 Webster]

         Lo! faitour, there thy meed unto thee take. --Spenser.
   [1913 Webster]