According to the mythographer Apollodorus, Iasion is the son of the Pleiad Electra and Zeus, and the brother of Dardanus[3] and possibly Emathion.
[6] In the Fabulae (attributed to Gaius Julius Hyginus), Iasion is called the son of Ilithyius.
When they rejoined the celebration, Zeus guessed what had happened because of the mud on Demeter's backside, and out of envy killed Iasion with a thunderbolt.
[13] Servius, in his commentary upon Virgil's Aeneid, states that Iasion was killed by his brother Dardanus,[14] whereas Hyginus attributes his death to horses.
[16] Some versions of this myth conclude with Iasion and the agricultural hero Triptolemus then becoming the Gemini constellation.