Iole

Iole with Heracles in the house of Eurytus, as depicted on the seventh-century Eurytos column-crater, Louvre. Iole's name is given in its Corinthian (Doric) form Ϝιόλᾱ ("Viola"), with digamma and a local Σ-shaped form for iota. It is located under the name of Heracles in the right upper corner of the image.

In Greek mythology, Iole (/ˈaɪ.əli/; Ancient Greek: Ἰόλη [iólɛː]) was the daughter of King Eurytus of Oechalia. According to the brief epitome in the Bibliotheca, Eurytus had a beautiful young daughter named Iole who was eligible for marriage. Iole was claimed by Heracles for a bride, but Eurytus refused her hand in marriage. Iole was indirectly the cause of Heracles' death because of his wife's jealousy of her.

There are different versions of the mythology of Iole from many ancient sources. The Bibliotheca gives the most complete story followed by slight variations of this from Seneca and Ovid. Other ancient sources (i.e. Diodorus Siculus, Gaius Julius Hyginus, and Pseudo-Plutarch) have similar information on Iole with additional variations.