davidist

from The Century Dictionary.

• noun One of the followers of David of Dinant in Belgium (hence called Dinanto), who taught extreme pantheistic doctrines.
• noun One of a fanatical sect which existed for more than a century after the death in 1556 of its founder, a Dutch Anabaptist, David George, or Joris. His followers were also called Davidians, David-Georgians, and Familists. See Familist.