I’d never really given much thought to the big islands and their geography since they’re inaccessible, but I think it’s a great idea to start naming some of the features. Of course, I’m late to the party once again and you’ve named the three! I do like the suggestion of calling number three “Great Mountain,” since so many landmarks in Sweden have straightforward, descriptive names. With that in mind, the three peaks work well together with simple, size-based names in the Swedish style: the tallest as Storberget, meaning “Great Mountain,” the middle one as Mellberget, or “Middle Mountain,” and the smallest as Lillberget, meaning “Little Mountain.” They form a clear and authentic set, the kind of straightforward naming that feels true to how real Scandinavian landmarks are often described. Still, I’d like to imagine the Östertörn locals might have their own name for the three peaks, perhaps drawing from Nordic mythology and linking them to the three Norn sisters. In Norse legend, the Norns are three powerful figures who shape the fate of all beings: Urðr, representing the past; Verðandi, the present; and Skuld, the future. It feels fitting that the mountains could be tied to them, standing side by side as eternal symbols of time and destiny. At their feet lies a lake, which could naturally be called Storbrunnsjön “Great Well Lake”, evoking Urðarbrunnr, the Norns’ own well. That said, your names are probably better once I’ve translated them! Should be a fun exercise!!!
That said, I’d really like to have a proper go at mapping the far north and far west ‘out of bounds’ areas, the parts you can actually get into and look around. There are some interesting cliff faces up there, a cave system, and even a small marshy pond area, but I’ve only explored them sporadically and never really spent a full day carefully mapping everything out. I don’t have the same skill for map-making that you do, but I’d love to see those grey terrain patches properly charted with the right colours for the forests, marshes, and snowy regions. The grey needs to go!!! It would be a huge project though, as the landscape gets strange at times with jagged, square-shaped terrain glitches, and when I ventured down into the far southeast the curvature of the ground even threw my compass completely out of whack. Hard to put into words, but it’s bizarre. Anyway, if you’re thinking of tackling those regions, definitely let me know, there might even be dragons lurking out there! Or a huge Gnome God!