Orion of Thebes was a 5th century grammarian of Thebes (Egypt), the teacher of Proclus

Proclus

Proclus Lycaeus , called "The Successor" or "Diadochos" , was a Greek Neoplatonist philosopher, one of the last major Classical philosophers . He set forth one of the most elaborate and fully developed systems of Neoplatonism...

 the neo-Platonist, and of Eudocia, the wife of Emperor Theodosius II

Theodosius II

Theodosius II , commonly surnamed Theodosius the Younger, or Theodosius the Calligrapher, was Byzantine Emperor from 408 to 450. He is mostly known for promulgating the Theodosian law code, and for the construction of the Theodosian Walls of Constantinople...

. He taught at Alexandria

Alexandria

Alexandria is the second-largest city of Egypt, with a population of 4.1 million, extending about along the coast of the Mediterranean Sea in the north central part of the country; it is also the largest city lying directly on the Mediterranean coast. It is Egypt's largest seaport, serving...

, Caesarea in Cappadocia and Byzantium

Byzantium

Byzantium was an ancient Greek city, founded by Greek colonists from Megara in 667 BC and named after their king Byzas . The name Byzantium is a Latinization of the original name Byzantion...

. He was the author of a partly extant etymological Lexicon (ed. F. W. Sturz, 1820), largely used by the compilers of the Etymologicum Magnum

Etymologicum Magnum

Etymologicum Magnum is the traditional title of a Greek lexical encyclopedia compiled at Constantinople by an unknown lexicographer around 1150 AD. It is the largest Byzantine lexicon and draws on many earlier grammatical, lexical and rhetorical works...

, the Etymologicum Gudianum and other similar works; a collection of maxims in three books, addressed to Eudocia, also ascribed to him by Suidas, still exists in a Warsaw

Warsaw

Warsaw is the capital and largest city of Poland. It is located on the Vistula River, roughly from the Baltic Sea and from the Carpathian Mountains. Its population in 2010 was estimated at 1,716,855 residents with a greater metropolitan area of 2,631,902 residents, making Warsaw the 10th most...

manuscript.

Sources