Orestes. See Agamemnon.
Orion. A giant and hunter of Boeotia. Blinded by Oenopion for ill-treatment of his daughter Merope, he recovered his sight by the help of Cedalion, who directed his eyes towards the rising sun.
Orithyia. Daughter of Erechtheus, king of Athens. Carried off by Boreas.
Orpheus. A Thracian musician, son of the Muse Calliope. His music charmed wild beasts, trees, and rocks, and prevailed upon Pluto to restore his wife Eurydice, on condition that Orpheus should not look back to see that she was following him; this condition not being observed, Eurydice remained in Hades. Orpheus was afterwards torn in pieces by the Thracian women, and his head and lyre thrown into the Hebrus, and carried to Lesbos.
Osiris. An Egyptian king, deified after death, as the husband of Isis.
Osroës. Son of Vologesus I. A king of Parthia, engaged in war with the Emperor Trajan.
Othryades. The only survivor of the three hundred Spartans who fought with three hundred Argives for the possession of Thyrea in Cynuria. Being left for dead by the two Argive survivors, he raised a trophy on the field, with an inscription in his own blood, and thus secured the victory.
Otus. See Ephialtes.
Pactōlus. A Lydian river, whose sands were said to contain gold.
Paean, (1) A name of Apollo; (2) a song sung before or after a battle.