Iolaos
Appearance
![](http://upload.wikimedia.org/wikipedia/commons/thumb/9/93/Lernaean_Hydra_Louvre_CA7318.jpg/300px-Lernaean_Hydra_Louvre_CA7318.jpg)
In Greek mythology, Iolaus (Greek: Ἰόλαος, Iólaos) was the nephew of Herakles, son of the hero's twin brother Iphicles and Automedusa. He was famed for having assisted Herakles in completing his Labors, serving as the hero's charioteer. A genus of Lycaenid butterfly has been named after him.