Campbellite

from The Collaborative International Dictionary of English v.0.48

Campbellite \Camp"bell*ite\, n. [From Alexander Campbell, of
   Virginia.] (Eccl.)
   A member of the denomination called Christians or Disciples
   of Christ. They themselves repudiate the term Campbellite as
   a nickname. See {Christian}, 3.
   [1913 Webster]