Doubkepost because it's been long enough: I happened to mention the story of the word for bear being taboo and my father lended me his book "Mammals in Swedish Folkly Tradition" which has super interesting info on a lot of things (did you know for example that people used to keep weasels as pest-hunters, similar to cats? Well, at least attempted to - attempts to permanently domesticise them failed, obviously, but having a weasel on a farm was considered very lucky and a good boob) and here is some more names for bear I found in it:
Björnkarl: "Bear Man", or "Brown Man" since that's what bear means in turn. "Karl" also means something more like "(free) man" rather than just "man", insinuating that it has no master. It's female equivalent is "björnkäring".
Fnasken/Fnaskus/Nasken/Naskus: "the snacker"/"the muncher"
Bjässe: Formed from björn, synonymous with something very big in modern Swedish
Billing: Means "Twin", used for bear cubs (they often have litters of two)
Billingmor: "Twinmother", used for bear mummies
Björntass/Björntafs: "Bearpaw" or "Brownpaw", used for small/adolescent bears ("Its not a big bear, just a small bearpaw")
Barfot, Skolös, Hallös: "Barefoot", "Shoeless", "Hall-less", and similar names. Often used in definite or "referring" forms ("the Barefoot" or "Old Shoeless") or with a name ("Barefoot Tom")
Ofreden: literally "the Un-Peace". Used for bears who savaged or killed animals or people. "Ravager" or similar might be closer to what it means.
Gullfot: "Goldpaw". Just one letter from the "Gulfot" ("Yellowpaw") I mentioned in the previous post, might be the same. Possibly a reference to eating honey?
Lots of names referring to elders: Godfar ("Goodfather"), Skogsfar ("Forest-/Woodfather"), Storfar ("Greatfather"), Gammeln ("The Old"/"the Elder"), Gubben (an old man, closest equivalent is probably "Gabber", like how Samwise Gamgi refers to his old man in LotR), Stor-gubben ("Great Gabber")
Some myths that was mentioned was the belief that the bear slept on one side half the winter, then turned over in her aleep in the middle of winter and slept on that side for the second half. So one had to be careful around a certain day or time (specifics vary from region to region) and not perform noisy chores or work like chopping wood or threshing, or you could disturb the bear in her sleep and then she'd seek revenge against you, your animals, or household in summertime.
They also preferred to bury people alive instead of killing them, if they had time - and particularly preyed on pregnant women and even more particularly on women pregnant with boys.
Friendly or pleased trolls could grant you a "trollbjörn" ("troll bear", but I hardly have to translate that I think - keep in mind though that "troll" is synonymous with magic or doing magic, so it also means "magic bear") to watch over and protect your farm and household. They were also called "giftbears".
Nefarious Sami witchmen (often the culprits in old Swedish tales from the border regions between the nations) would turn into bears and beastly were-bears during the night and eat your livestock if you angered them.
Bear gall was considered very a very potent curative. Helped against acidious stomachs, instilled appetite, tooth ache, birth pains, frost burns, kidney ails, and inflammation if the lung (I can't remember your fancy latin word for it right now). The book mentions that in the 18th century it was mixed with brännvin (brandy, "burn-wine", you know, booze) but no mention of how it was prepared before distillated booze was invented.
Bear blood was also considered a healing aid, particularly against epilepsy. Bear fat was used as salves and balms "for a great deal of ailments" but no mention of specifics I'm that case.
Super interesting book! I highly recommend it.