Orithyia (daughter of Erechtheus)

[1] She was sister to Cecrops, Pandorus, Metion, Protogeneia, Pandora, Procris, Creusa, and Chthonia.

[7] Orithyia gave Boreas two daughters, Chione and Cleopatra (the wife of Phineus) and two sons, Calais and Zetes, both known as the Boreads.

[15] Because she was in Thrace with Boreas, she did not die when her sisters who either committed suicide or were sacrificed so that Athens could win a war against Eleusis.

[citation needed] In the Posthomerica of Quintus Smyrnaeus, she gave Penthesileia a very swift horse when she visited Thrace.

It is said that prior to the destruction of a large number of barbarian ships due to weather during the Persian War, the Athenians offered sacrifices to Boreas and Oreithyia, praying for their assistance.