Hermes Trismegistus was an Isu entity revered as a Greek and Egyptian god of alchemy and magic. He was worshiped primarily by an ancient religious order called the Hermeticists.
Sometime in the sixth century BCE, Hermes Trismegistus met Pythagoras and his protégé Kyros of Zarax in the Greek desert. There, Hermes passed his staff onto Pythagoras, naming him his successor.
During the 1st century BCE in Egypt, the citizens of Hermopolis replaced Thoth with Hermes in the Temple of Thoth. Berenike, the Nomarch of the Faiyum Oasis wrote a commendation to the temple, extending her thanks for embracing Hermes and promised they would be well compensated.
An illustration of Hermes Trismegistus