Procne (; Ancient Greek: Πρόκνη, Próknē [pró.knɛː]) or Progne is a minor figure in Greek mythology. She was an Athenian princess as the elder daughter of a king of Athens named Pandion. Procne was married to the king of Thrace, Tereus, who instead lusted after her sister Philomela. Tereus forced himself on Philomela and locked her away. When Procne discovered her sister and her gruesome fate, she took revenge against her husband by murdering their only child, a young boy named Itys. Procne's story serves as an origin myth for the nightingale. Source: Wikipedia (en)