Close but not right. The true name of the bear is karhu.

I don't get the joke here, but just want to point out that Finnish is subject to the same taboo. "Karhu" is related to "karhea" ie. refers to the rough fur/pelt of the bear. The original Fenno-Ugric word os probably something like otso or ohto.

Isn't that just the Finnish name? The comic talks about the "true" English name.