Agamemnon \a-gamem-non, ag(a)-me-mnon\ as a boy's name is of Greek origin, and the meaning of Agamemnon is "working slowly". Greek mythology: a mighty warrior and hero who commanded the Greeks at the siege of Troy. In the typical tragedy of Greek myth, his daughter Iphigenia was sacrificed before the Trojan war and when he came home from the war, his wife Clytemnestra killed him.