In later Greek genealogical traditions, Pandora’s daughter was Pyrrha. Pyrrha is usually described as the daughter of Epimetheus and Pandora, making her part of the family line that survives the catastrophic flood sent by Zeus.
Pyrrha becomes especially important in the myth of Deucalion. Deucalion is the son of Prometheus, while Pyrrha is descended from Pandora through Epimetheus. The pair are warned about the flood, survive it, and become the ancestors of a renewed human population in a well-known Greek creation story.
This genealogy is distinct from the original jar episode. Hesiod’s surviving works focus on Pandora’s creation, marriage, and the release of evils, while later mythographers and traditions expand her family relationships. Some ancient genealogies vary, so the answer belongs specifically to the tradition that identifies Pyrrha as Pandora’s daughter.