The Nornir, or Anglicized "Norns," are the goddesses of Fate, or Wyrd. There are three: Urdhur (who represents the past), Verdhandi (who represents the present), and Skuld (who represents the future).
Anglicized Name: The Norns
Appear in: The Saga of Asa Oathkeeper
Source: Norse Mythology. Some concepts borrowed from other, similar figures, e.g. The Three Fates in Greek Mythology.