Uri, did you know that multiple copies of Sefer Enoch were found at Qumran?    They are in Aramaic. . .   My understanding is that they probably post-date the codification of the T'nach (anywhere from 150 - 300 BCE). . . 

We do know that the Men of the Great Assembly were the ones who debated what to include and exclude from the T'nach.   The "Maccabee" books post-dated them.   Possibly Enoch post dated them as well. . . 



סופי

And everything that Sarah tells you, listen to her voice. Bereshit (Genesis) 21:12