Referencing John Levi Peterson, his mother, Anna Nelson, was sister to my great grandfather John Nelson. John Albert Peterson and Anna Nelson lived in Norbotten, Sweden, and were married there. I have a decent amount of info on this family in my tree, so please feel free to take a look. Everything I have is there. If anyone has additional information about John and Anna Peterson, I would certainly love to see it, particularly Anna's side.
FYI, I've attached Anna Nelson Peterson's) birth record. The marriage record for Anna and John Peterson is in my tree (entry # 47 on the register).