dates range from c.2000 B.C. to c. 750 B.C.
founder of Thebes
inventor of 16 letters of greek
Cadmus was credited by the ancient Greeks (Herodotus[3] is an example) with introducing the original Alphabet or Phoenician alphabet -- phoinikeia grammata, "Phoenician letters" -- to the Greeks, who adapted it to form their Greek alphabet. Herodotus estimates that Cadmus lived sixteen hundred years before his time, or around 2000 BC.[4]......
In Phoenician, as well as Hebrew, the Semitic root qdm signifies "the east", the Levantine origin of "Kdm" himself, according to the Greek mythographers; the equation of Kadmos with the Semitic qdm was traced to a publication of 1646 by R. B. Edwards.[20] The name Kadmos has been thoroughly Hellenised. The fact that Hermes was worshipped in Samothrace under the name of Cadmus or Cadmilus seems to show that the Theban Cadmus was interpreted as an ancestral Theban hero corresponding to the Samothracian. Another Samothracian connection for Cadmus is offered via his wife Harmonia, who is said by Diodorus Siculus to be daughter of Zeus and Electra and of Samothracian birth.[21]