Coeus

Coeus is one of the twelve Titans. He and his sister Phoebe had two daughters, Leto and Asteria. Leto became the mother of Apollo and Artemis by Zeus, which makes Coeus their grandfather.

Later writers, helped by the similarity of his name to the Greek verb meaning to enquire, saw him as the Titan of questioning or intelligence. This is an interpretation rather than something the ancient sources say outright.

He fought with the Titans against Zeus and was imprisoned in Tartarus afterwards.