Iole
In Greek mythology, Iolë (Ancient Greek: Ἰόλη) was the daughter of Eurytus, king of the city Oechalia. According to the brief epitome by the so-called Apollodorus, 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's 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 his 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.
Read more about Iole: Heracles' Love For Iole Leads To His Death