John Philoponus

John Philoponus (Greek: Ἰωάννης ὁ Φιλόπονος; born circa 490 – died circa 570), also known as John the Grammarian or John of Alexandria, was an Alexandrian philologist, Aristotelian commentator and Christian theologian, author of a considerable number of philosophical treatises and theological works. https://en.wikipedia.org/wiki/John_Philoponus