c. 1500, "a versicle sung responsively," from French antiphone "hymn" or directly from Medieval Latin antiphona, from Greek antiphona (neuter plural), from antiphonos "responsive, sounding in answer," from anti "in return" (see anti-) + phōnē "voice," from PIE root *bha- (2) "to speak, tell, say."
A reborrowing by English 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