ὀΐεσσι

From LSJ

ἐν ὀνόματι τῆς ἁγίας καὶ ὁμοουσίου καὶ ἀδιαιρέτου Τριάδος → in the name of the Holy and Consubstantial and Indivisible Trinity

Source

Greek Monotonic

ὀΐεσσι: Επικ. αντί οἴεσι, δοτ. πληθ. του ὀΐς.