TBH, Germany seems more logical as a lot of the names are Germanic (Loewen/Roewen is a basically German for Lion, Kraft etc) and also the geography. Germany (especially if you combine the docked Austrian region) is a pretty big country that spans some much warmer zones in the south next to Italy, but also borders cold, icy places like Denmark in the North.
Given those northern regions of Scandinavia and the likes were hold outs for pagan religions and practices well into the Roman era and then back out into the Dark Ages and beyond, it'd make a lot of sense for a Pagan Wolf god travelling south to have come from that region of northern Europe
Yes the maps show it's obviously fantasy, but if you're trying to place it, Central Germanic Europe has a lot going for it in terms of trying to tag down where it'd be.