It is necessary to say a little about the origin of the games.
Some writers, who trace back the institution of the games to the earliest times, say that they had been held before Heracles, by one of the Idaean Dactyls; and then by Aethlius, as a challenge for his sons (from his name, the competitors were called athletes); and then by his son Epeius; and then Endymion, Alexinus and Oenomaus were each in charge of the sacred festival.
Then Pelops held the games in honour of his father Zeus; and next, Heracles the son of Alcmene.
There were ten generations (or, according to some, only three complete festivals) from Heracles until the time of Iphitus.