Harpocration

Valerius Harpocration was a Greek grammarian and lexicographer of Alexandria, probably active in the 2nd century CE. He compiled a 'Lexicon of the Ten Orators,' explaining the names, terms, and references found in the classical Athenian orators, a work that preserves much information about Athenian law, history, and institutions. Little is known of his life, and his exact date is uncertain.