Maybe not so much ...
Wikipedia famously has a page of "List of common misconceptions." And on that list is this:
There is no evidence that Vikings wore horns on their helmets. In fact, the image of Vikings wearing horned helmets stems from the scenography of an 1876 production of the Der Ring des Nibelungen opera cycle by Richard Wagner.
If that's so, then what's up with these helmets on display in the Nationalmuseet in Copenhagen?
The misconception is cited to a work called World History: Societies of the Past by Charles Kahn, published in 2005 by Portage & Main Press. I feel this finding calls into question all of Mr. Kahn's work.