c. 1500, "a versicle sung responsively," from French antiphone "hymn" or directly from Medieval Latin antiphona, from Greek antiphōna (neuter plural), from antiphōnos "responsive, sounding in answer," from anti "in return" (see anti-) + phōnē "voice" (from PIE root *bha- (2) "to speak, tell, say").
A reborrowing of the word which had become anthem in English (in Old English antefn, antifon) and lost its original meaning.
noun suffix, in army, city, country, etc., from Old French -e, Latin -atus, -atum, past participle suffix of certain verbs, which in French came to be used to indicate "employment, office, dignity" (as in duché, clergié).
<a href="https://www.etymonline.com/word/antiphony">Etymology of antiphony by etymonline</a>
Harper, D. (n.d.). Etymology of antiphony. Online Etymology Dictionary. Retrieved $(datetime), from https://www.etymonline.com/word/antiphony