I think I've found it...
The Eighth Circle of Hell is resided by the fraudulent. Dante and Virgil reach it on the back of Geryon, a flying monster with different natures, just like the fraudulent. This circle of Hell is divided into 10 Bolgias or stony ditches with bridges between them. In Bolgia 1, Dante sees panderers and seducer. In Bolgia 2 he finds flatterers. After crossing the bridge to Bolgia 3, he and Virgil see those who are guilty of simony. After crossing another bridge between the ditches to Bolgia 4, they find sorcerers and false prophets. In Bolgia 5 are housed corrupt politicians, in Bolgia 6 are hypocrites and in the remaining 4 ditches, Dante finds hypocrites (Bolgia 7), thieves (Bolgia 7), evil counselors and advisers (Bolgia 8), divisive individuals (Bolgia 9) and various falsifiers such as alchemists, perjurers, and counterfeits (Bolgia 10).
The last Ninth Circle of Hell is divided into 4 Rounds according to the seriousness of the sin. Though all residents are frozen in an icy lake. Those who committed more severe sin are deeper within the ice. Each of the 4 Rounds is named after an individual who personifies the sin. Thus Round 1 is named Caina after Cain who killed his brother Abel, Round 2 is named Antenora after Anthenor of Troy who was Priams counselor during the Trojan War, Round 3 is named Ptolomaea after Ptolemy (son of Abubus), while Round 4 is named Judecca after Judas Iscariot, the apostle who betrayed Jesus with a kiss.
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