Proclus' commentary on Plato's Cratylus is the only ancient commentary on this work to have survived, and is illuminating in two particular respects. First, it is actually the work of two Neoplatonists. The majority of the material is supplied by the Athenian-based Proclus (c. 411-485 AD), who is well known for his magisterial commentaries on Plato's Timaeus and Parmenides, as well as for a host of other works involving the...