Aethyr or æthyr may refer to:
an archaic spelling of ether Aethyrs, in Enochian magic Aethyr, a fictional character in the Phantom Zone of DC Comics Aethyr, a fictional character in Smallville (season 5) Aethyr, a fifth element in the Cthulhu Mythos Aethyr, a disciple of General Zod in DC comics The Aethyr, in the Warhammer Fantasy universe
See also Aether (disambiguation)