[2] With his sister, the Titaness Theia, Hyperion fathered Helios (Sun), Selene (Moon) and Eos (Dawn).
[4] John Keats's abandoned epic poem Hyperion is among the literary works that feature the figure.
[11] Afterwards, in the words of Hesiod, Hyperion subjected his sister Theia to his love, and fathered three children with her, who became the lights of heaven: Helios (Sun), Selene (Moon), and Eos (Dawn).
[13] As a Titan, one of the oldest generation of gods, Hyperion was a fitting father for these three sky-gods who, as elements of the natural world, must have been conceived of as having come into being near the beginning of the cosmos.
"[19] According to the rationalizing historian Diodorus Siculus, Hyperion was the name of the first person to understand the movement of the sun and moon, and their effect on the seasons, and explains that, because of this, he was said to be their "father": Of Hyperion we are told that he was the first to understand, by diligent attention and observation, the movement of both the sun and the moon and the other stars, and the seasons as well, in that they are caused by these bodies, and to make these facts known to others; and that for this reason he was called the father of these bodies, since he had begotten, so to speak, the speculation about them and their nature.