Theognostus
2. A Byzantine grammarian, who lived at the beginning of the ninth century after Christ. He was the author of a work on prosody, which is still extant in manuscript, addressed to the emperor Leo, the Armenian. He also wrote a history of the reign of Michael II., surnamed the Stammerer, the successor of Leo. (Villoison, Anecd. Graec. vol. ii. p. 127; Fabric. Bibl. Graec. vol. vi. p. 350.)
From William Smith (ed.), Dictionary of Greek and Roman Biography and Mythology. Text provided under a CC BY-SA license by Perseus Digital Library, http://www.perseus.tufts.edu, with funding from the National Endowment for the Humanities and Tufts University. Data accessed from https://github.com/PerseusDL/canonical-pdlrefwk/ on 17 October 2026.