Note 4 — Chapter V · LIFE OF PLATO.

The statements respecting Plato’s relatives are obscure and perplexing: unfortunately the domestica documenta, which were within the knowledge of his nephew Speusippus, are no longer accessible to us. It is certain that he had two brothers, Glaukon and Adeimantus: besides which, it would appear from the Parmenides (126 B) that he had a younger half-brother by the mother’s side, named Antiphon, and son of Pyrilampes (compare Charmides, p. 158 A, and Plut., De Frat. Amore, 12, p. 484 E). But the age, which this would assign to Antiphon, does not harmonise well with the chronological postulates assumed in the exordium of the Parmenides. Accordingly, K. F. Hermann and Stallbaum are led to believe, that besides the brothers of Plato named Glaukon and Adeimantus, there must also have been two uncles of Plato bearing these same names, and having Antiphon for their younger brother. (See Stallbaum’s Prolegg. ad Charm. pp. 84, 85, and Prolegg. ad Parmen., Part iii. pp. 304-307.) This is not unlikely: but we cannot certainly determine the point — more especially as we do not know what amount of chronological inaccuracy Plato might hold to be admissible in the personnel of his dialogues.

It is worth mentioning, that in the discourse of Andokides de Mysteriis, persons named Plato, Charmides, Antiphon, are named among those accused of concern in the sacrileges of 415 B.C. — the mutilation of the Hermæ and the mock celebration of the mysteries. Speusippus is also named as among the Senators of the year (Andokides de Myst. p. 13-27, seq.). Whether these persons belonged to the same family as the philosopher Plato, we cannot say. He himself was then only twelve years old.