symmachian

from The Century Dictionary.

• Pertaining to Symmachus, or to the sect of Ebionites supposed to have been named from him. See Symmachian.
• noun A member of a Judaizing sect, supposed to have been so named from symmachus the Ebionite, author of one of the Greek versions of the Old Testament in the second century. The Ebionites were still known by this name in the fourth century.