Xenophon, son of Gryllus, of the deme Erchia of Athens, also known as Xenophon of Athens, was a Greek historian, soldier, mercenary, and student of Socrates. Xenophon: Marmorbüste im Kgl. Museum, Berlin, Bibliothek des allgemeinen und praktischen Wissens. Bd. 5" (1905), Abriß der Weltliteratur, Seite 46. Image File:Xenophon.jpg from Wikimedia Commons, in Public Domain.