In Greek mythology, Prometheus is the brother who warned Epimetheus about gifts from Zeus.
Prometheus and Epimetheus are brothers in the Titan family, and their names express contrasting qualities. Prometheus is associated with forethought, while Epimetheus is associated with afterthought. Hesiod uses this contrast when describing Pandora’s arrival: Prometheus warns Epimetheus not to accept gifts from Zeus, but Epimetheus accepts Pandora anyway.
This detail is separate from Pandora’s marital relationship and from the identity of the god who creates her. The warning helps explain the brothers’ symbolic roles in the myth. Prometheus anticipates danger, while Epimetheus recognizes the consequence only afterward, a pattern reflected in the meanings traditionally assigned to their names.