nereids(redirected from Oreithuia)
, in Greek mythology, female divinity associated with various natural objects. It is uncertain whether they were immortal or merely long-lived. There was an infinite variety of nymphs. Some represented various localities, e.g.
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in ancient Greek mythology, sea nymphs, the 50 daughters of “the old man of the sea,” Nereus. Hesiod named the Nereids, and many of the names reflect the various qualities of a calm, tender, playful sea. The best-known Nereids are Amphitrite, wife of Poseidon, and Thetis, mother of Achilles. In Slavonic mythology, the inhabitants of the “watery kingdom” (bylina [epic folk song] about Sadko) were similar to the Nereids.