Macaria

She was in Heraclidae, a play by Euripides. She and her brothers and sisters hid from Eursytheus in Athens, ruled by King Demophon. As Eurystheus prepared to attack, an oracle told Demophon that he would win if and only if a noble woman was sacrificed to Persephone. Macaria volunteered for the sacrifice and a spring was named the Macarian spring[?] in her honor.