Considering that "Mihonium" has been around for at least several weeks to months (e.g. post #2374977), associating it with the similar-sounding "Nihonium" is no surprise. Check out Twitter.
In at least two other related fronts, Motorhead and Discworld fans are disappointed that they won't be seeing "Lemmium" and "Octarine" in the periodic table anytime soon at the very least.