(Ἰόλη), the last beloved of Heracles, and a daughter of Eurytus of Oechalia. [HERACLES.] According to some writers, she was a half-sister of Dryope. (Ant. Lib. 32; Ov. Met. 9.325, &c.)
[L.S]A Dictionary of Greek and Roman biography and mythology
Smith, William
A Dictionary of Greek and Roman biography and mythology. William Smith, LLD, ed. 1890