E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
Atossa.
Sarah, Duchess of Marlborough, so called by Pope, because she was the friend of Lady Mary Wortley Montague, whom he calls Sappho. Herodotus says that Atossa, the mother of Xerxes, was a follower of Sappho.