valentinian

from The Century Dictionary.

• Of or pertaining to Valentinus or the Valentinians.
• noun A follower of Valentinus, of the second century, the founder of the most influential and best-known of the Gnostic systems.

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

• noun (Eccl. Hist.) One of a school of Judaizing Gnostics in the second century; -- so called from Valentinus, the founder.