Theiodamas (or Theodamas) was a king of the Dryopes and the father of Hylas. When he refused to give one of the bulls with which he was ploughing to Heracles, the latter killed him and carried off his handsome son Hylas to be his escort. His name means 'divine tamer', from theos, 'god' and damazo, 'to tame'. This would have been a propitious name.