I have been really immersed in my Norwegian DNA and have concluded that my step grandfather Sigurd Boe is actually my biological grandfather which he indicated at least twice to me. Norwegian records are awesome and free and I now have several generations of my paternal ancestors in and around Bjarkoy Troms Norway. A cousin, son of my father's half brother has been located thanks to a wonderful native of that small island, and I have exchanged pictures with him.
I tried to do the same for our Swansons but it is very difficult.I paid for a trial subscription on Genline but so far it is an uphill struggle without knowing the parish.Norwegian records have something called ' bygddebok' which are family pedigrees for certain lines. Bless them!
The Genline US specialist tells me ( as I knew ) that very likely our Swanson men were Anders and Carl son of Swen and from Gothenberg which can mean the city or the county. She sent some other possible places to check but our men came too early for them.
One new thing was said however: "While they would not be part of the original Colonial Swedes or included in what is defined as the Colonial Swedes, they may have become active in the Swedish community at the time and joining some Swedish organizations. However, they may have known someone or been related to someone and that is why they emigrated to Philadelphia "
So possibly we are actually some kin to the Colonial Swedes or were known to them. That could be a clue and I will follow it.