THE GOSPEL OF THOMAS
" I: Commentary
The Gospel of Thomas is a collection of traditional Sayings (logoi) of Jesus. It is attributed to Didymos Judas Thomas, the "Doubting Thomas" of the canonical Gospels, and according to many early traditions, the twin brother of Jesus ("didymos" means "twin" in Greek).
We have two versions of the Gospel of Thomas today. The
first was discovered in the late 1800's among the Oxyrhynchus
Papyri, and consists of fragments of a Greek version, which has
been dated to c. 200. The second is a complete version, in
Coptic, from Codex II of the Nag Hammadi finds. Thomas was
probably first written in Greek (or possibly even Syriac or
Aramaic) sometime between the mid 1st and 2nd centuries..."
https://sacred-texts.com/chr/thomas.htm