In Greek and Roman mythology Odysseus (əˈdɪsiəs ; OdysseúsOdyseús, o.dy(s).sěu̯s), also known by the Latin variant Ulysses (juːˈlɪsiːz , UKalsoˈjuːlɪsiːz ; UlyssesUlixes), is a legendary Greek king of Ithaca and the hero of Homer's epic poem the Odyssey. Odysseus also plays a key role in Homer's Iliad and other works in that same epic cycle.
Son of Laërtes and Anticlea, husband of Penelope, and father of Telemachus, Acusilaus, and Telegonus Odysseus is renowned for his intellectual brilliance, guile, and versatility (polytropos), and is thus known by the epithet Odysseus the Cunning (mêtis). He is most famous for his nostos, or "homecoming", which took him ten eventful years after the decade-long Trojan War.
The form Ὀδυσ(σ)εύς Odys(s)eus is used starting in the epic period and through the classical period, but various other forms are also found. In vase inscriptions, we find the variants Oliseus (Ὀλισεύς), Olyseus (Ὀλυσεύς), Olysseus (Ὀλυσσεύς), Olyteus (Ὀλυτεύς), Olytteus (Ὀλυττεύς) and Ōlysseus (Ὠλυσσεύς). The form Oulixēs (Οὐλίξης) is attested in an early source in Magna Graecia (Ibycus, according to Diomedes Grammaticus), while the Greek grammarian Aelius Herodianus has Oulixeus (Οὐλιξεύς). In Latin, he was known as Ulixēs or (considered less correct) Ulyssēs. Some have supposed that "there may originally have been two separate figures, one called something like Odysseus, the other something like Ulixes, who were combined into one complex personality." However, the change between d and l is common also in some Indo-European and Greek names, and the Latin form is supposed to be derived from the Etruscan Uthuze (see below), which perhaps accounts for some of the phonetic innovations.
The etymology of the name is unknown. Ancient authors linked the name to the Greek verbs odussomai (ὀδύσσομαι) "to be wroth against, to hate", to oduromai (ὀδύρομαι) "to lament, bewail", or even to ollumi (ὄλλυμι) "to perish, to be lost". Homer relates it to various forms of this verb in references and puns.