Agonius (Gr. Ἀγώνιος) or Enagonius was an epithet of several gods in Greek mythology (or a distinct deity). Aeschylus and Sophocles use it of Apollo and Zeus, and apparently in the sense of helpers in struggles and contests, or possibly as the protectors of soldiers. But Agonius is more especially used as an epithet of Hermes, who presides over all kinds of solemn contests (ἀγῶνες), such as the Agonalia. Classical scholar William Warde Fowler thought it likely the deity or the epithets were merely inventions of the pontifices. "Agonius" was also the original name of the Quirinal Hill in Rome.