Signy or Signe (Old Norse: Signý, sometimes known as German: Sieglinde) is the name of two heroines in two connected legends from Norse mythology which were very popular in medieval Scandinavia. Both appear in the Völsunga saga, which was adapted into other works such as Wagner's 'Ring' cycle, including its famous opera Die Walküre. Signy is also the name of two characters in several other sagas.