The Gospel of Thomas ("good news of the twin") and the only sect explicitly recorded following it, the Naassenes as recorded in Pseudo-Hippolytus's Refutations book 5.

The latter picked up a lot of the Valentinian Gnostic ideas absent in the former, but seem to have held on to some rather unique concepts which help to flesh out and ground the concepts in Thomas.

In particular, the way the Naassenes use the language of Lucretius regarding 'seeds' is very revealing in terms of the context for sayings in Thomas historically dismissed as just 'weird' - not weird, just a response to Epicureanism.