I am aware that this is a controversial topic, but in a universe where around c. 500 BCE a population of Canaanite mariners did manage to set up a trading post in what is now Sweden: how plausible is a Semitic etymology for a toponym like Oslo? Are there any other toponyms that could at least hypothetically come from a similar origin? Or is the whole idea too far-fetched?
I realize as I ask this that the first order of business would be to determine if there were, indeed, Phoenicians or other Semitic language speakers anywhere past Gibraltar around that time. Trying to find recent research on the hypothetical creolization of proto-Germanic by contact with a Semitic language, so any references on either side of the argument will be greatly appreciated.