Iolao, Yolao. Yolas or Iolas, was a nephew of Hercules, whom he helped in some of his works. He was the son of Ificles and Automedusa. He helped him kill Lerna's Hydra and steal Gerion's cattle.
IOLAO: Son of Iphicles and Automedusa, and nephew of Hercules, also called Iolaus.