In Hesiod’s account of Pandora, which Titan was her brother-in-law?

In Hesiod’s account of Pandora, Prometheus was her brother-in-law.

Prometheus was Pandora’s brother-in-law because he was the brother of Epimetheus, the man who received and married Pandora. The two Titans are presented as opposites in name and character: Prometheus suggests forethought, while Epimetheus suggests afterthought.

Hesiod’s story gives Prometheus a cautionary role. He warns Epimetheus not to accept a gift from Zeus, but Epimetheus ignores the warning when Pandora arrives. The myth therefore connects Pandora’s arrival with the consequences of Zeus’s conflict with Prometheus, especially after Prometheus steals fire for humanity.

Readers sometimes call Prometheus Pandora’s husband because both figures are central to the same myth cycle. That is incorrect: Epimetheus is Pandora’s husband, while Prometheus is his brother. Prometheus is also associated with the creation or early protection of humans in later traditions, but the details vary among ancient authors. Hesiod’s version is the earliest surviving literary account that connects Pandora with the release of human troubles.