Hyperion was the Titan traditionally identified as the father of the sun god Helios and moon goddess Selene.
Hyperion was one of the children of Gaia, Earth, and Uranus, Sky, making him one of the twelve Titans in the standard Hesiodic genealogy. He joined with his sister Theia, and their children were the celestial deities Helios, Selene, and Eos. Helios drove the sun across the sky, Selene embodied the moon, and Eos represented the dawn.
A common mix-up comes from Hyperion’s own connection with the sun. In Homeric poetry, “Hyperion” can function as an epithet of Helios, meaning something like “the one above” or “the high one.” Other passages, especially in later genealogical accounts, clearly distinguish Hyperion as Helios’s father. The question follows that standard father-and-children genealogy.
Greek myth does not give Hyperion a large independent narrative comparable to Cronus or Zeus. His importance lies mainly in his place among the first divine generations and in his role as ancestor of the heavenly lights. Some ancient sources vary Selene’s parentage, but Hyperion remains the canonical answer for the usual Titan genealogy.