Cadmus \c(a)-dmus, cad-mus\ as a boy's name is of Greek origin, and the meaning of Cadmus is "from the east". Greek mythology: Cadmus is the founder of the city of Thebes, who ultimately turned into a serpent. He is also credited with the invention of writing in letters.

Cadmus has 6 variant forms: Cadmar, Cadmo, Cadmos, Cadmuss, Kadmos and Kadmus.