(Θεοφανὴς Νόννος,) sometimes called Nonus, a Greek medical writer who lived in the tenth century after Christ, as his work is dedicated to the emperor Constantinus Porphyrogenitus, A. D. 911-959, at whose command it was composed. Though commonly called Nonnus, it is supposed by some persons that his real name was Theophanes.
[W.A.G]A Dictionary of Greek and Roman biography and mythology
Smith, William
A Dictionary of Greek and Roman biography and mythology. William Smith, LLD, ed. 1890