…term “persona” … derived from Etruscan, meaning mask.’ Jung said the Latin word persona came from per sonare, to sound through, because masks had a sort of tube inside, from the actor’s mouth into the mouth of the mask, a built-in megaphone to amplify the sound so it would carry. The mask came to be called persona after this megaphone. Not Etruscan.
Ira Progoff / Ximena de Angulo ‘Comments on a Doctoral Thesis’ from ‘C. G. Jung Speaking’ Picador.