Pyrrha became the mother of Hellen with Deucalion in Greek mythology.
Pyrrha is commonly described as the daughter of Epimetheus and Pandora. She marries Deucalion, the son of Prometheus, and becomes central to the Greek flood myth. When Zeus sends a devastating flood, Deucalion and Pyrrha survive by taking refuge in a chest or ark-like vessel, depending on the retelling.
After the flood, the couple restores humanity by throwing stones behind them. The stones become people: Deucalion’s become men and Pyrrha’s become women. Their son Hellen is presented in later genealogical traditions as an ancestor of the Hellenes, the Greek people.
This family connection is a later mythological development surrounding Pandora rather than part of the brief opening-vessel scene in Hesiod’s Works and Days. Genealogies can vary among ancient authors, but the standard tradition identifies Pyrrha as Pandora’s daughter and Deucalion’s wife. She is therefore distinct from Pandora herself.