Aiantis (Ancient Greek: Αἰαντίς) was a phyle of ancient Attica with six demes:[1] Aphidna, Marathon, Oenoe, Rhamnous, Tricorythus and Phalerum.
[2] It was named in honour of Ajax the Great.
Marathon is located within the boundaries of this place.
[3] It is attested by Plutarch that fifty-two members of the tribe of Aiantis died from wounds sustained in the Battle of Plataea.
[4] The playwright Aeschylus came from deme Eleusis in Aiantis.