Æthra

, daughter of Pit the us king of Trœzene, had These us by Ægeus. See: Ægeus . She was carried away by Castor and Pollux, when they recovered their sister Helen, whom These us had stolen, and intrusted to her care. See: Helena . She went to Troy with Helen. Homer , Iliad , bk. 3 , li. 144 .— Pausanias , bk. 2 , ch. 31 ; bk. 5 , ch. 19 .— Hyginus , fables 37 & 79.— Plutarch , These us .— Ovid , Heroides , poem 10, li. 131 .――One of the Oceanides, wife to Atlas. She is more generally called Pleione.