Isnt ĂgishjĂĄlmur mentioned in Volsunga sag?
Yeah, ĂgishjĂĄlmur is mentioned in FĂĄfnismĂĄl, one of the poems in the Poetic Edda which was worked into Völsunga saga, and the description of it â that it strikes fear into your enemies â is also present, but the symbol itself doesnât actually appear in any of those manuscripts as far as I know. It seems to be a physical object rather than a repeatable symbol:
Sigurður fann ĂŸar stĂłrmikið gull og sverðið Hrotta, og ĂŸar tĂłk hann ĂŠgishjĂĄlm og gullbrynjuna og marga dĂœrgripi.
âSigurður found there a great deal of gold and the sword Hrotti, and took from there the ĂŠgishjĂĄlmur and gold-armor and many precious treasures.â
[Edit: I changed my mind about how valuable this piece of evidence is:Â http://thorraborinn.tumblr.com/post/93430829603/thorraborinn-hedendom-heathenfairytale]
One of the difficulties in tracing the origin of late Icelandic things is that they never stopped reading old Icelandic things, and trying to interpret and adapt them into their contemporary context.
ĂgishjĂĄlmur does occupy a unique position among the other staves though, not only because the name is mentioned early on, but also (in my opinion; I havenât seen this written anywhere by any specialists) because of the relative simplicity of the symbol which makes it look like something of a template for later ones.
There is also an Indian symbol which is startlingly similar which some people have suggested points to a common origin although I would say itâs a simple enough symbol that two independent inventions (especially that aren't exactly the same) doesnât sound unrealistic. I am aware of at least one cross-shaped bindrune from an early inscription though I canât find it or remember what it says⊠itâs a five-letter word with one letter on each âspokeâ and one in the middle at the intersection. So it could be an example of the idea in development.
By my own estimation, it seems most likely that the symbol came into use, and then eventually someone noticed it was being used in a manner similar enough to what is described in Fåfnismål/Völsunga saga that they came to be identified with each oher.
There actually are a few symbols called ĂgishjĂĄlmur beside the well-known one:
âNine ĂgishjĂĄlmarâ from GaldrasĂœning, not sure from what manuscript.
âĂgishjĂĄlmur the beautifulâ from JĂłnas JĂłnassonâs notes, attributed to Sigurður JĂłnsson (the bottom one).