The exceptional nature of the Old Norse stories does not prove they were based on real-life individuals, at however great a remove, not least since such figures only appear in certain genres of saga-writing and not others. However, they certainly do not refute the existence of real female warriors. In truth, the medieval texts are interesting, but strictly speaking unnecessary, for the interpretation of the excavated data. These burials are decidedly not medieval saga, legend, or poetic licence but empirically observable Viking-Age reality.
