TBESG:ἑκάτεροςto each othereach of two, either, each singly , [Refs 5th c.BC], etc.:—;in sg., with a pl. noun, like Lat. uterque, ταῦτα εἰπόντες ἀπῆλθον ἑκάτερος [5th/4th c.BC]; except when each party is a pl., [5th/4th c.BC] (ML)