DIOGENIANUS, of Heraclea on the Pontus (or in Caria), Greek grammarian, flourished during the reign of Hadrian. He was the author of a lexicon (sometimes known as rEptEnorbmres for "industrious poor students") which was perhaps abridged from the great lexicon of Pamphilus of Alexandria (fl. A.D. 50) and other similar works. It formed the basis of the lexicon of Hesychius of Alexandria, described in the p.feface as a new edition of the works of Diogenianus. We still possess a collection of proverbs under his name (ed. by E. Leutsch and F. W. Schneidewin in Paroemio graphi Graeci, 1839). Diogenianus was also the author of an anthology of epigrams; of geographical treatises; and of a list (with map) of all the towns in the world.
See H. Weber, Philol. Suppl. III., 454 f. (1878) ; Bursian's Jahresb. xvii., 125 0880 .