Definition from Wiktionary, the free dictionary
From Ancient Greek Ἀγαμέμνων (Agamemnōn, “very resolute”).
Proper noun 
- (Greek mythology) One of the most distinguished heroes of Greek mythology. He is the son of King Atreus of Mycenae and Queen Aerope, and brother of Menelaus. He is attributed with rallying the Greeks for the Trojan War