Scylla,

daughter of Nisus, promised to deliver Megʹara into the hands of Minos. To redeem this promise she had to cut off a golden hair on her father’s head, which she effected while he was asleep. Minos, her lover, despised her for this treachery, and Scylla threw herself from a rock into the sea. At death she was changed into a lark, and Nisus into a hawk. Scylla turned into a rock by Circe “has no connection” with the daughter of Nisus.