@Swedishbooks
Vanir could be a twist from Väina+maised (Väinä+möinen / Väinä+möiset). Väin means "a strait". Väina+meri is a strait sea in and around West Estonian archipelago. Väina river is the old livonian name for the river Daugava in Latvia. But more broadly, Väina+meri might have denoted the whole Baltic Ice Lake, which at one (or several) point was a strait between the North Sea and the White sea. And when the glaciers were still plentiful, then the rivers Väina and Viena might have flowed at the rim of the BaltoScandian glacier. And the river that led to Toonela might have been a river that went under the glacier.
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@Swedishbooks
Vanir could be a twist from Väina+maised (Väinä+möinen / Väinä+möiset). Väin means "a strait". Väina+meri is a strait sea in and around West Estonian archipelago. Väina river is the old livonian name for the river Daugava in Latvia. But more broadly, Väina+meri might have denoted the whole Baltic Ice Lake, which at one (or several) point was a strait between the North Sea and the White sea. And when the glaciers were still plentiful, then the rivers Väina and Viena might have flowed at the rim of the BaltoScandian glacier. And the river that led to Toonela might have been a river that went under the glacier.