Oyez
late Middle English: from Old French oiez!, oyez! ‘hear!’, imperative plural of oir, from Latin audire ‘hear’.
wiktionary
From Middle English oyes, oyas, oye, from Anglo-Norman and Middle French oyez, oiez, imperative plural of oir(“to hear”), from Old French oïr(“to hear”), itself from Latin audiō, audīre(“to hear”) ( oyez in particular corresponding to the second-person plural imperative form, audite). Commonly folk-etymologized as (and pronounced homophonously to) O + yes in the early modern period.
etymonline
oyez (interj.)
a call for silence and attention; the introduction to a proclamation made by an officer of a law-court," early 15c., from Anglo-French oyez "hear ye!" (late 13c., Old French oiez), a cry uttered (usually thrice) to call attention, from Latin subjunctive audiatis, plural imperative of audire "to hear" (from PIE root *au- "to perceive").
