Tulipa subgen. Orithyia

In Greek mythology, Orithyia or Oreithyia (; Ancient Greek: Ὠρείθυια, romanized: Ōreíthyia; Latin: Ōrīthyia; lit. 'mountain-raging' or 'mountain-rushing') was the name of the following women:

Orithyia or Orythya, the Nereid of raging seas and one of the 50 marine-nymph daughters of the 'Old Man of the Sea' Nereus and the Oceanid Doris. She and her other sisters appear to Thetis when she cries out in sympathy for the grief of Achilles at the slaying of Patroclus.