Onasander

Onasander or Onosander ( Onesandros or Ὀνόσανδρος Onosandros; fl. 1st century AD) was a Greek philosopher. He was the author of a commentary on the Republic of Plato, which is lost; as well as of the Strategikos () - a short but comprehensive work on the duties of a general, which was dedicated to Quintus Veranius. The Strategikos was the main source used for the military writings of emperors Maurice and Leo VI, as well as of Maurice of Saxony, who consulted it in a French translation and expressed a high opinion of it.

== Life == According to the Suda, he was a Platonic philosopher who, in addition to his surviving military work, Strategikos, or The General, also composed a commentary upon Plato's Republic. The only details known about Onasander's life are from his own work, the Quintus Veranius to whom he dedicated the Strategikos to was the consul of A.D. 49, who died while in command in Britain ten years later, so the terminus ante quem for the composition of the treatise is 59. The only other references to Onasander from antiquity are in Johannes Lydus, who names an Ὀνήσανδρος among Greek military writers, and in the Tactica of the so‑called Leo.