Hippocoon was the son of the Spartan King Oebalus and Bateia.
[1][2] Names of Hippocoön's sons include Dorycleus, Scaeus, Enarophorus, Euteiches, Bucolus, Lycaethus, Tebrus, Eurytus, Hippothous, Hippocorystes, Alcinous,[3] Alcimus, Dorceus, Sebrus, Eumedes,[4] Enaesimus, Alcon and Leucippus (the last three were among the Calydonian hunters).
Hippocoön, with the help of his sons, overthrew him, took the throne and expelled his brothers from the kingdom .
Because of that, Heracles became hostile to Hippocoön, killed him and reinstated Tyndareus.
[8] Heracles's allies in the war against Hippocoön were Cepheus of Arcadia and his twenty sons, who all, as well as Heracles's brother Iphicles, died in the battle (according to Diodorus Siculus,[6] three of Cepheus' sons did survive).