Commentary on the First Alcibiades of Plato (Cambridge, University Library, MS Kk.5.27)

...not to be initiated into the union until the time of the release. And he did so. And when Plato was born, the parents took him, while he was an infant, and placed him on Mount Hymettus, wishing to sacrifice on his behalf to the gods there—Pan, and the nymphs, and Apollo Nomios the Shepherd. And while he lay there, bees approached and filled his body with honeycomb, so that what was said about him might be true: "And from his tongue flowed speech sweeter than honey." He calls himself everywhere a fellow-servant to the swans, as one who came forth from Apollo, for that bird is Apollonian. Having come of age, he first attended Dionysius the grammarian for the learning of common letters, whom he also mentions in the Erastae Lovers of Wisdom, so that Dionysius the teacher might not be without a share of the memory regarding Plato. Then after him, he used as a teacher a trainer, Ariston the Argive, by whom, they say, Plato was renamed—previously being called Aristocles, by the name of his grandfather. He was called this Plato because he had two parts of his body very broad platys broad...