Pæan
A paean (/ˈpiːən/) is a song or lyric poem expressing triumph or thanksgiving. In classical antiquity, it is usually performed by a chorus, but some examples seem intended for an individual voice (monody). It comes from the Greek παιάν (also παιήων or παιών), "song of triumph, any solemn song or chant." "Paeon" was also the name of a divine physician and an epithet of Apollo.
The basis of the word παιάν is *παιάϝων. Its ultimate etymology is unclear. R. S. P. Beekes has suggested the meaning "who heals illnesses through magic," from *παῖϝα/*παϝία "blow", related to παίω "beat" (from Proto-Indo-European *ph2u-ie/o-) or παύω "withhold" (of uncertain etymology). He alternatively suggested that paian "may well be Pre-Greek."
In Homer, Paeon was the Greek physician of the gods. In Iliad V he heals the wounded Ares and Hades with his herbal lore. In time Paeon (or Paean) became an epithet of Apollo as a god capable of bringing disease and propitiated as a god of healing. Hesiod identifies Paeon as a separate god, and in later poetry Paeon is invoked independently as a health god. Later, Paean becomes an epithet of Asclepius, another healer-god.
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