In Greek mythology, Pandora married Epimetheus according to the usual retelling. Epimetheus was Prometheus's brother, and he accepted Pandora despite Prometheus's warning not to receive gifts from Zeus.
The names are significant: Prometheus is associated with forethought, while Epimetheus is associated with afterthought. In the story's logic, Prometheus anticipates danger, but Epimetheus acts after the fact. Hesiod's account makes Pandora the wife of Epimetheus and connects her opening of the vessel with the spread of suffering.
Some modern versions simplify the story by describing Pandora as Prometheus's wife, because Prometheus is the better-known figure and is central to the fire episode. That is a common mix-up. The canonical relationship in the Pandora narrative is Pandora and Epimetheus, while Prometheus is Epimetheus's brother and Zeus's adversary.