Apion Pleistoneices (Greek: Ἀπίων Πλειστονίκου Apíōn Pleistoníkēs; 30–20 BC – c. AD 45–48),[1] also called Apion Mochthos, was a Hellenized Egyptian[2] grammarian, sophist, and commentator on Homer. He was born at the Siwa Oasis and flourished in the first half of the 1st century AD. His name is sometimes incorrectly spelled Appion, and some sources, as in the Suda, call him a son of Pleistoneices, while others more correctly state that Pleistoneices was only a surname, and that he was the son of Poseidonius.[3][4][5]