Achilles (Ἀχιλλεύς), son of *Peleus and *Thetis; greatest of the Greek heroes in the Trojan War; central character of *Homer's Iliad.

His name may be of Mycenaean Greek origin, meaning ‘a grief to the army’. If so, the destructive Wrath of Achilles, which forms the subject of the Iliad, must have been central to his mythical existence from the first.

In Homer he is king of Phthia, or ‘Hellas and Phthia’, in southern Thessaly (see phthiotis), and his people are the Myrmidons. As described at Il. 2. 681–5 the size of his kingdom, and of his contingent in the Trojan expedition (50 ships), is not outstanding. But in terms of martial prowess, which is the measure of excellence for a Homeric hero, Achilles' status as ‘best of the Achaeans’ is unquestioned. We are reminded of his absolute supremacy throughout the poem, even during those long stretches for which he is absent from the battlefield.