Circa 1220 AD, the Icelandic scholar Snorri Sturluson laid down the Old Norse sagas in a work that is known today as the Prose Edda. In stanza thirty-six of the first book, Glyfaginning, Snorri numbers the mythical valkyries, the dísir:
Hrist and Mist
I would have bear the horn to me.
Skeggjöld and Skögul,
Hildr and Thrúdr,
Hlökk and Herfjötur,
Göll and Geirahöð,
Randgríðr and Ráðgríðr,
bear ale to the einherjar.
These are called the valkyries.
The thirteen valkyries and their einherjar, like the Old Norse gods, have long since passed into myth and folklore.
Ragnarök Willie will know the answer. Or not.