Hermes Trismegistus

In the name "Hermes Trismegistus", the word "trismegistus" means "thrice-master".
The name "Hermes Trismegistus" is the self-appointed pseudonym of an egomaniacal schizotypal person
who wrote "The Corpus Hermeticum" in the first century CE.
The corpus hermeticum is a mixture of neoplatonism, gnosticism, judeo-christian morality,
and that which woud later come to be called "hermetic alchemy".
Subsequently, other writers used the same pseudonym, pretending to be the same person.