Adrastus of Aphrodisias
Adrastus of Aphrodisias (; fl. 2nd century) was a Peripatetic philosopher who lived in the first half of the 2nd century AD. 

He was the author of a treatise on the arrangement of Aristotle's writings and his system of philosophy which was quoted by Simplicius, and by Achilles Tatius. Some commentaries of his on the Timaeus of Plato are also quoted by Porphyry, which was also used by Theon of Smyrna in the surviving sections of his On Mathematics Useful for the Understanding of Plato. and a treatise on the Categories of Aristotle by Galen. 

None of these works have survived. In some medieval manuscripts, a work with the title Harmonica was attributed to Adrastus, however, this was a misattribution of a work by Manuel Bryennios.

Notes

Ancient testimony
 
 Athenaeus, Deipnosophistae 15.15
 Porphyry, Commentary on Ptolemy's Harmonics
 Simplicius, Commentary on Aristotle's Categories

References

2nd-century Greek philosophers
Commentators on Aristotle
Commentators on Plato
Roman-era Peripatetic philosophers
Ancient Greek music theorists
People from Aphrodisias