I stumbled across a page from AM 738 4to with an expanded Norwegian Rune Poem with verses for additions to the standard sixteen “base” runes. I had some trouble translating it, but I’ve posted a normalized version of the text and my tentative attempt at a translation on the “late additions to the runes” page. For convenience, I’ll reproduce the part I just added after the break.
One of my interests is how late medieval and early modern poets and scribes continued to propagate information about runes, and occasionally tweak things here and there, like by adding new names and kennings to runes that previously were merely variants of others.
The earliest ones mentioned here picked up and are copied with somewhat high frequency (though are not universal). Others look like they are late innovations that couldn’t carve out a permanent place for themselves, but are interesting inventions anyway.
Read the page here.