A Dictionary of Greek and Roman biography and mythology

2. An Amazon, a sister of Hippolyte, who married Theseus. (Paus. 1.2.1, 41.7.) According to Servius(Serv. ad Aen. 11.661), she was a daughter of Hippolyte. Diodorus (4.16) states, that Theseus received her as a present from Heracles.

When subsequently Attica was invaded by the Amazons, Antiope fought with Theseus against them, and died the death of a heroine by his side. (Comp. Diod. 4.28; Plut. Thes. 26, 27.) According to Hyginus (Hyg. Fab. 241) Antiope was a daughter of Ares, and was killed by Theseus himself in consequence of an oracle.