Teucer was Ajax's half-brother, son of Telamon by Hesione, sister of Priam (Telamon's prize from the first Trojan War when he served with Heracles). Hence the name which means "Trojan" although he was a Greek. He is an archer, and staunchly supports Ajax in the fighting. Later he is away when Ajax commits suicide, and does not dare to return to face his father, founding instead a new Salamis in Cyprus.