 Instead the honor was granted to their son and grandson, for which reason the two lines were called the Agiads and the Eurypontids.The story of the double kingship of Sparta begins with the invasion of the Peloponnesus by the Dorians, and the Aetolian allies, under three Heraclid commanders, Temenus, Cresphontes and Aristodemus, the three sons of Aristomachus.Karl Otfried Müller collected and evaluated the various fragments of the story from classical authors.