Terms

Epicharmus of Sicily

Epicharmus of Sicily
 
 
 Epicharmus of Sicily added to Greek the 2 letters Theta and Chi (Θ, Χ), letters 8 and 22, making 20 letters in total, but some accounts tells us that he invented instead Psi and Pi (Ψ, Π), letters 23 and 16.
Caius Julius Hyginus, Fables, 277.  Graves 1948, edition 1966:  224-225.
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