Dionysius_Thrax Dionysius Thrax () (170 BC‑90 BC) was a Hellenistic grammarian from Thrace (hence the name Thrax) who lived and is thought by some to have worked in Alexandria and later at Rhodes.The first extant grammar of Greek, "Art of Grammar" (Tékhnē grammatiké) is attributed to him but many scholars today doubt that the work really belongs solely to him due to the difference between the technical approach of most of the work and the more literary approach (similar to the second century's Alexandrian tradition) of the first few sections.