The Norns — Old Norse nornir, singular norn — are the female beings who shape the destinies of gods and humans in Norse mythology. The three great Norns who dwell at the Well of Urð beneath the roots of Yggdrasil are the most important, but the Norse sources also describe many lesser norns — some of the race of gods, some of elves, some of dwarves — who attend the birth of every child and determine the shape of that individual life. The three great Norns set the structure of cosmic fate; the lesser norns fill in the details of individual lives.
Their origins are described in the Völuspá — the great prophetic poem of Norse mythology — which places their arrival as one of the pivotal events in cosmic history: "From thence come maidens, much knowing, three, from the hall beneath the tree; Urð is one named, Verðandi the next — on wood they scored — and Skuld the third. Laws they established, life chose they; for the children of men they marked out the fates." The arrival of the Norns is the moment when fate enters the world — when the cosmos becomes not just a space of existence but a structured narrative with beginnings, middles and ends.
The Norse concept of fate that the Norns embody is wyrd — a word that has survived into modern English as "weird," though its original meaning was something like "that which has turned" or "that which has come to pass." Wyrd is not a simple linear destiny but a complex, woven fabric — the accumulated web of all past events and choices, which shapes but does not entirely determine the present and future. Fate in Norse thought is not a single predetermined path but a field of possibility constrained by what has already occurred.
Unlike the Greek Moirai, the Norns are not described as old women — they appear in different forms in different sources, sometimes as young women, sometimes as ancient crones. What is consistent is their power: the gods themselves — including Odin — are subject to what the Norns have decreed. Even the doom of the gods at Ragnarök is written in the runes they have carved into Yggdrasil.