Atreus is a character in Greek mythology.
Atreus can also mean:
14791 Atreus, an asteroid Atreus (God of War), a video game character Atreus, a lost play by Lucius Accius The Treasury of Atreus, a Bronze Age tholos tomb at Mycenae
See also Atrus, a character in the Myst series of games House Atreides, the royal house in Frank Herbert's Dune universe