Hephaestion

Hephaestion was a Greek grammarian and metrician active in Alexandria during the 2nd century CE, in the Roman imperial period. He is best known for his Enchiridion de Metris (Handbook on Meters), a concise treatise on Greek metrics that survives as the abridgment of a much larger lost work. It became the standard ancient guide to verse forms and is a crucial source for fragments of otherwise lost Greek poetry. He is also credited with writings on poems (peri poiematon). His handbook was widely used and annotated by later scholars, making him a foundational figure in the study of classical prosody.