Did you know that

[GonzoStyle]

Well I remember brutus and judas were in the 9th level, after skimming through it brutus, judas, cassius and lucifer himself are in the 9th level and judas was guilty of "Traitors to lords and benefactors; those who set out to destroy the rightful God."

The punishment to judas, cassius and brutus is:

At the center of the Earth, completely submerged in ice. The three ultimate traitors are held in Lucifer's three mouths. Lucifer's three wings send forth freezing blasts of impotence, ignorance and hatred.

Some other notables are

Alexander the great and Attila who were at the 7th level of hell, they ofcourse were guilty of being war makers, their punishment is being submerged in hot blood for eternity.

Homer, Socrates, and Plato were in the first circle of hell alongside virtious pagans and unbaptized infants.

Cain would probably be in the 9th layer with Lucifer himself by that token I guess.