Comment by thaumasiotes

Well, it's fair enough to observe that the Vikings spoke a North Germanic language while the Angles, Saxons, Jutes, Franks, and Frisians spoke a West Germanic one. Other than that, it seems pretty clear that the category "Germanic groups such as the Saxons, Franks, and Frisians" would include Vikings. "Such as" isn't exactly the mark of an exhaustive list.

(And interestingly enough, the cognate word ("wicing") is attested in Old English a long time before it's attested in Old Norse. It means "pirate". It wouldn't be at all surprising if Saxons raiding England referred to themselves that way, just like Danes raiding England did later.)