Prince Antiochus Epiphanes was the son the similarly named King of Commagene, an eastern client state of Rome. He was in Rome in 69AD, is mentioned in Tacitus as having been wounded, commanding some of the Othonians cavalry at Ad Castores. He later shows up at the siege of Jerusalem, under Titus, where he leads a charge of his "Macedonian" bodyguard against the city walls. I like to think of him as the very last of the Successors.
To depict him I've used yet another Aventine general, but this time on an Aventine Greek horse with leopard skin saddlecloth which seemed appropriate for the son of an eastern potentate. The praetorian cavalry shield is from A and A. I really love the helmet on this piece, I might return to gild parts of it.