Hyperion's son Helios was referred to in early mythological writings as Helios Hyperion (Ἥλιος Ὑπερίων, "Sun High-one"). In Homer's Odyssey, Hesiod's Theogony and the Homeric Hymn to Demeter, the Sun is once in each work called Hyperionides (Ὑπεριωνίδης, "son of Hyperion"), and Hesiod certainly imagines Hyperion as a separate being in other writings. In later Greek literature, Hyperion is always distinguished from Helios; the former was ascribed the characteristics of the "God of Watchfulness, Wisdom and Light", while the latter became the physical incarnation of the Sun. Hyperion is an obscure figure in Greek culture and mythology, mainly appearing in lists of the twelve Titans:
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.
There is little to no reference to Hyperion during the Titanomachy, the epic in which the Olympians battle the ruling Titans, or the Gigantomachy, in which Gaia attempts to avenge the Titans by enlisting the aid of the giants (Γίγαντες) that were imprisoned in Tartarus to facilitate the overthrow of the Olympians.
Apollodorus, Apollodorus, The Library, with an English Translation by Sir James George Frazer, F.B.A., F.R.S. in 2 Volumes. Cambridge, MA, Harvard University Press; London, William Heinemann Ltd. 1921.
Euripides, The Complete Greek Drama, edited by Whitney J. Oates and Eugene O'Neill, Jr. in two volumes. 2. The Phoenissae, translated by E. P. Coleridge. New York. Random House. 1938.
Evelyn-White, Hugh, The Homeric Hymns and Homerica with an English Translation by Hugh G. Evelyn-White. Homeric Hymns. Cambridge, MA., Harvard University Press; London, William Heinemann Ltd. 1914.
Hesiod, Theogony, in The Homeric Hymns and Homerica with an English Translation by Hugh G. Evelyn-White, Cambridge, MA.,Harvard University Press; London, William Heinemann Ltd. 1914.