Apollo is one of the Olympian deities in ancient Greek religion and mythology. His numerous functions include light, healing, prophecy, music, poetry, and archery. He is the son of Zeus and Leto, and the twin brother of Artemis, goddess of the hunt. He is considered to be the most beautiful god and is represented as the ideal of the kouros (ephebe, or a beardless, athletic youth).

As the patron deity of Delphi (Apollo Pythios), Apollo is an oracular god—the prophetic deity of the Delphic Oracle and the deity of ritual purification. His oracles were often consulted for guidance in various matters. He was in general seen as the god who affords help and wards off evil, and is referred to as , the "averter of evil". Medicine and healing are associated with Apollo, whether through the god himself or mediated through his son Asclepius. Apollo delivered people from epidemics, yet he is also a god who could bring ill health and deadly plague with his arrows. The invention of archery itself is credited to Apollo and his sister Artemis. Apollo is usually described as carrying a silver or golden bow and a quiver of arrows.

As the god of mousike, Apollo presides over all music, songs, dance, and poetry. He is the inventor of string-music and the frequent companion of the Muses, functioning as their chorus leader in celebrations. The lyre is a common attribute of Apollo. Protection of the young is one of the best attested facets of his panhellenic cult persona. As a , Apollo is concerned with the health and education of children, and he presided over their passage into adulthood. Long hair, which was the prerogative of boys, was cut at the coming of age () and dedicated to Apollo. The god himself is depicted with long, uncut hair to symbolise his eternal youth.

Apollo is an important pastoral deity, and he was the patron of herdsmen and shepherds. Protection of herds, flocks and crops from diseases, pests and predators were his primary rustic duties. On the other hand, Apollo also encouraged the founding of new towns and the establishment of civil constitutions, is associated with dominion over colonists, and was the giver of laws. His oracles were often consulted before setting laws in a city. Apollo Agyieus was the protector of the streets, public places and home entrances. In the 5th century BC, his worship was imported to Rome.

From the 5th century BCE, Apollo was often identified with Helios, the personification of the Sun.For the iconography of the Alexander–Helios type, see H. Hoffmann, 1963. "Helios", in Journal of the American Research Center in Egypt 2, pp. 117–23; cf. Yalouris 1980, no. 42. Although Latin theological works from at least 1st century BCE identified Apollo with Sol,Cicero, On the Nature of the Gods, § 2.68Lucius Annaeus Cornutus, Greek Theology, § 65 there was no conflation between the two among the classical Latin poets until 1st century CE.Joseph Fontenrose, "Apollo and Sol in the Latin poets of the first century BC", Transactions of the American Philological Association 30 (1939), pp 439–55; "Apollo and the Sun-God in Ovid", American Journal of Philology 61 (1940) pp 429–44; and "Apollo and Sol in the Oaths of Aeneas and Latinus" Classical Philology 38.2 (April 1943), pp. 137–138. Apollo is known in Greek-influenced Etruscan mythology as Apulu.Krauskopf, I. 2006. "The Grave and Beyond." The Religion of the Etruscans. edited by N. de Grummond and E. Simon. Austin: University of Texas Press. p. vii, p. 73-75.

Etymology

Apollo (Attic, Ionic, and Homeric Greek: , ( ); Doric: , ; Arcadocypriot: , ; Aeolic: , ; )

The name Apollo—unlike Paean, the related older name—is generally not found in the Linear B (Mycenean Greek) texts, although there is a possible attestation in the lacunose form ]pe-rjo-[ (Linear B: ]-[) on the KN E 842 tablet,R. S. P. Beekes, Etymological Dictionary of Greek, Brill, 2009, p. 118. though it has also been suggested that the name might actually read "Hyperion" ([u]-pe-rjo-[ne]).

The etymology of the name is unclear. The spelling ( in Classical Attic) had almost superseded all other forms by the beginning of the common era, but the Doric form, (), is more archaic, as it is derived from an earlier . It probably is a cognate to the Doric month Apellaios (), and the offerings () at the initiation of the young men during the family-festival ()."The young men became grown-up , and Apollon was the (The Great Kouros) : Jane Ellen Harrison (2010): Themis: A study to the Social origins of Greek Religion Cambridge University Press. pp. 439–441, According to some scholars, the words are derived from the Doric word (), which originally meant "wall", "fence for animals" and later "assembly within the limits of the square".The word usually appears in plural: Hesychius: (), ("folds"), ("assemblies"), ("elections"): Nilsson, Vol. I, p. 556Doric Greek verb: ("to assemble"), and the festival ), which surely belonged to Apollo. Nilsson, Vol I, p. 556. Apella () is the name of the popular assembly in Sparta, corresponding to the (). R. S. P. Beekes rejected the connection of the theonym with the noun and suggested a Pre-Greek proto-form *Apalyun.Beekes, 2009, pp. 115, 118–119.

Several instances of popular etymology are attested by ancient authors. Thus, the Greeks most often associated Apollo's name with the Greek verb (), "to destroy". Plato in Cratylus connects the name with (), "redemption", with (apolousis), "purification", and with (), "simple",The suggestion is repeated by Plutarch in Moralia in the sense of "unity". in particular in reference to the Thessalian form of the name, , and finally with (), "ever-shooting". Hesychius connects the name Apollo with the Doric (), which means "assembly", so that Apollo would be the god of political life, and he also gives the explanation (), "fold", in which case Apollo would be the god of flocks and herds. In the ancient Macedonian language () means "stone",R. S. P. Beekes, Etymological Dictionary of Greek, Brill, 2009, p. 1168. and some toponyms may be derived from this word: (Pella,. the capital of ancient Macedonia) and (Pellēnē/Pellene).Nilsson Vol I, p. 558

The Hittite form Apaliunas (d) is attested in the Manapa-Tarhunta letter.The reading of Apaliunas and the possible identification with Apollo is due to Emil Forrer (1931). It was doubted by Kretschmer, Glotta XXIV, p. 250. Martin Nilsson (1967), Vol I, p. 559 The Hittite testimony reflects an early form , which may also be surmised from the comparison of Cypriot with Doric . The name of the Lydian god Qλdãns // may reflect an earlier /-/ before palatalization, syncope, and the pre-Lydian sound change * > . Note the labiovelar in place of the labial // found in pre-Doric and Hittite Apaliunas. A Luwian etymology suggested for Apaliunas makes Apollo "The One of Entrapment", perhaps in the sense of "Hunter".

Greco-Roman epithets Apollo's chief epithet was Phoebus ( ; , Phoibos ), literally "bright".R. S. P. Beekes, Etymological Dictionary of Greek, Brill, 2009, p. 1582. It was very commonly used by both the Greeks and Romans for Apollo's role as the god of light. Like other Greek deities, he had a number of others applied to him, reflecting the variety of roles, duties, and aspects ascribed to the god. However, while Apollo has a great number of appellations in Greek myth, only a few occur in Latin literature.

Sun Aegletes ( ; , Aiglētēs), from , "light of the Sun"Apollonius of Rhodes, 2.1730;Apollodorus, 1.9.26. Helius ( ; , Helios), literally "Sun" Lyceus ( ; , Lykeios, from Proto-Greek *), "light". The meaning of the epithet "Lyceus" later became associated with Apollo's mother Leto, who was the patron goddess of Lycia () and who was identified with the wolf ().Aelian, On the Nature of Animals 4. 4 (A.F. Scholfield, tr.) Phanaeus ( ; , Phanaios), literally "giving or bringing light" Phoebus ( ; , Phoibos), literally "bright", his most commonly used epithet by both the Greeks and Romans Sol (Roman) (), "Sun" in Latin

Wolf Lycegenes ( ; , Lukēgenēs), literally "born of a wolf" or "born of Lycia" Lycoctonus ( ; , Lykoktonos), from , "wolf", and , "to kill"

Origin and birth Apollo's birthplace was Mount Cynthus on the island of Delos.

Cynthius ( ; , Kunthios), literally "Cynthian" Cynthogenes ( ; , Kynthogenēs), literally "born of Cynthus" Delius ( ; , Delios), literally "Delian" Didymaeus ( ; , Didymaios) from δίδυμος, "twin", as the twin of Artemis

Place of worship Delphi and Actium were his primary places of worship.Ovid, Metamorphoses 13.715.Strabo, x. p. 451

Acraephius ( ; , Akraiphios, literally "Acraephian") or Acraephiaeus ( ; , Akraiphiaios), "Acraephian", from the Boeotian town of Acraephia (), reputedly founded by his son Acraepheus.Wiliam Smith. Dictionary of Greek and Roman Biography and Mythology Acraepheus Actiacus ( ; , Aktiakos), literally "Actian", after Actium () Delphinius ( ; , Delphinios), literally "Delphic", after Delphi (Δελφοί). An etiology in the Homeric Hymns associated this with dolphins. Epactaeus, meaning "god worshipped on the coast", in Samos. Pythius ( ; , Puthios, from Πυθώ, Pythō), from the region around Delphi Smintheus ( ; , Smintheus), "Sminthian"—that is, "of the town of Sminthos or Sminthe". near the Troad town of HamaxitusThe epithet "Smintheus" has historically been confused with , "mouse", in association with Apollo's role as a god of disease Napaian Apollo (), from the city of Nape at the island of LesbosSuda, nu, 31 Eutresites, from the city of Eutresis.

Ixios (Ἴξιος), derived from a district in Rhodes called Ixiae or Ixia.Harry Thurston Peck, Harpers Dictionary of Classical Antiquities (1898), Ixios

Healing and disease

Acesius ( ; , Akesios), from , "healing". Acesius was the epithet of Apollo worshipped in Elis, where he had a temple in the agora. Acestor ( ; , Akestōr), literally "healer" Culicarius (Roman) ( ), from Latin culicārius, "of midges" Iatrus ( ; , Iātros), literally "physician"Euripides, Andromache 901 Medicus (Roman) ( ), "physician" in Latin. A temple was dedicated to Apollo Medicus in Rome, probably next to the temple of Bellona. Paean ( ; , Paiān), physician, healerπαιών Parnopius ( ; , Parnopios), from , "locust"

Founder and protector Agyieus ( ; , Aguīeus), from , "street", for his role in protecting roads and homes Alexicacus ( ; , Alexikakos), literally "warding off evil" Apotropaeus ( ; , Apotropaios), from , "to avert" Archegetes ( ; , Arkhēgetēs), literally "founder" Averruncus (Roman) ( ; from Latin āverruncare), "to avert" Clarius ( ; , Klārios), from Doric , "allotted lot"κλάρος Epicurius ( ; , Epikourios), from , "to aid" Genetor ( ; , Genetōr), literally "ancestor" Nomius ( ; , Nomios), literally "pastoral" Nymphegetes ( ; , Numphēgetēs), from , "Nymph", and , "leader", for his role as a protector of shepherds and pastoral life Patroos (, Patrōios) from , "related to one's father", for his role as father of Ion and founder of the Ionians, as worshipped at the Temple of Apollo Patroos in Athens Sauroctonus (, Sauroctonos), "lizard-killer", possibly a reference to his killing of Python

Prophecy and truth Coelispex (Roman) ( ), from Latin coelum, "sky", and specere "to look at" Iatromantis ( ; , Iātromantis,) from , "physician", and , "prophet", referring to his role as a god both of healing and of prophecy Leschenorius ( ; , Leskhēnorios), from , "converser" Loxias ( ; , Loxias), from , "to say", historically associated with , "ambiguous" Manticus ( ; , Mantikos), literally "prophetic" Proopsios (), meaning "foreseer" or "first seen"Pausanias, Description of Greece, 1.32.2

Music and arts Musagetes ( ; Doric , Mousāgetās), from , "Muse", and "leader". Musegetes ( ; , Mousēgetēs), as the preceding

Archery Aphetor ( ; , Aphētōr), from , "to let loose" Aphetorus ( ; , Aphētoros), as the preceding Arcitenens (Roman) ( ), literally "bow-carrying" Argyrotoxus ( ; , Argyrotoxos), literally "with silver bow"