In Greek mythology, which figure is Pandora’s son-in-law?

In Greek mythology, Deucalion is Pandora’s son-in-law because he marries her daughter Pyrrha. Deucalion and Pyrrha become central figures in the Greek flood myth, which follows the earlier story of Pandora.

Zeus sends a devastating flood to destroy humanity, but Deucalion and Pyrrha survive by taking refuge in a chest or ark. After the waters retreat, they seek guidance from Themis about how to restore the human race. Her cryptic instruction to throw the bones of their mother behind them is interpreted as an order to cast stones from the earth.

According to the myth, stones thrown by Deucalion become men, while stones thrown by Pyrrha become women. Their names are therefore connected with the renewal of humanity after destruction.

Different ancient writers preserve varying genealogies and details, but the standard family connection is stable in classical mythology: Pandora and Epimetheus are Pyrrha’s parents, and Deucalion is Pyrrha’s husband. That makes him Pandora’s son-in-law.