The world it came from
The nine-stave grid is not a Viking artefact and appears in no manuscript or excavation. It emerged in late twentieth-century heathen and rune-work circles as a teaching device. What is old is the concept it diagrams: wyrd in Old English, urðr in Old Norse, the same root as the Norn Urðr and the verb verða, 'to become'. Anglo-Saxon poetry states it flatly — Wyrd bið ful aræd, fate is wholly inexorable.