What does IACHUS stand for? 

iachus

In ancient Greek religion and mythology, Iacchus (also Iacchos, Iakchos) (Greek: Ἴακχος) was a minor deity, of some cultic importance, particularly at Athens and Eleusis in connection with the Eleusinian mysteries, but without any significant mythology. He perhaps originated as the personification of the ritual exclamation Iacche! cried out during the Eleusinian procession from Athens to Eleusis. He was often identified with Dionysus, perhaps because of the resemblance of the names Iacchus and Bacchus, another name for Dionysus. By various accounts he was a son of Demeter (or apparently her husband), or a son of Persephone, identical with Dionysus Zagreus, or a son of Dionysus. During the Greco-Persian Wars, when the Attic countryside, deserted by the Greeks, was being laid waste by the Persians, a ghostly procession was supposed to have been seen advancing from Eleusis, crying out “Iacchus”. This miraculous event was interpreted as a sign of the eventual Greek victory at the Battle of Salamis (480 BC). Iacchus was also possibly involved in an Eleusinian myth in which the old woman Baubo, by exposing her genitals, cheered up the mourning Demeter.

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