origenist

from The Century Dictionary.

• noun A follower of Origen of Alexandria; one who held or professed to hold the doctrines held by or attributed to Origen.
• noun A member of a sect mentioned by Epiphanius as followers of some unknown person named Origen. He attributes shameful vices to them, but supplies no further information concerning them.

from the GNU version of the Collaborative International Dictionary of English.

• noun A follower of Origen of Alexandria.