Titans
Koios
In Greek mythology, Koios is a titan who was the son of Uranus and Gaia (according to the Olympian myth), or was the son of Eurynome and Ophion (according to the Pelasgian myth). He was supposed to be the god of reason.
He married his sister Phoibe and had two daughters with her (Leto and Asteria). He took part in the rebellion of the Titans against Zeus, and after his defeat was cast down to Tartarus.