The Sweden Project, with excellent, helpful, experienced volunteers, has been invaluable in helping me learn the initial ropes of investigating far back into Swedish ancestry. Kudos to Eva Ekblad and the team who are cited on the Nystrom and Swanson lineage of my husband's family tree. It all started with hand written family trees. Now, with the help of volunteers here, and some Ancestry, Family Search, and other public genealogy resources, I've been able to verify almost seven generations of ancestors for the family, to go with photos the family has collected and I now have.
I am grateful to WikiTree as information like this "wants to be free." I am glad to share what I can to preserve the history and provide links to what written histories and book resources are available as well.
PS: Google Translate has also been invaluable.