Theognis (disambiguation)

Theognis is the name of:


 * Theognis of Megara, 6th century BC Greek elegiac poet
 * Theognis (tyrant), one of the Thirty Tyrants of Athens in 404–403 BC (possibly to be identified with the minor tragic poet mentioned by Aristophanes)
 * Theognis of Nicaea, 4th century AD bishop